List of the Paleozoic life of Nevada

This list of the Paleozoic life of Nevada contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Nevada and are between 541 and 252.17 million years of age.

A
  • †Aatocrinus
    • †Aatocrinus permicus
  • †Acaciapora
    • †Acaciapora duncanae – type locality for species
  • †Acanthocladia
  • †Acanthopecten
    • †Acanthopecten coloradoensis
  • Fossil of the Silurian-Middle Devonian trilobite Acanthopyge
    †Acanthopyge
  • †Achlysopsis
    • †Achlysopsis hemitora
    • †Achlysopsis liokata
  • †Aciculolenus
    • †Aciculolenus peculiaris
  • †Acidiphorus
    • †Acidiphorus brevis – or unidentified comparable form
    • †Acidiphorus lineotuberculatus
    • †Acidiphorus pseudobathurus
  • †Aclisina
  • †Acmarhachis
    • †Acmarhachis acuta
    • †Acmarhachis acutus
    • †Acmarhachis typicalis
  • †Acodus
    • †Acodus auritus – or unidentified comparable form
  • †Acontiodus
    • †Acontiodus alveolaris
  • †Acosarina
    • †Acosarina mesoplatys
  • †Acratia
    • †Acratia gassanovae – or unidentified related form
    • †Acratia silincula – or unidentified related form
    • †Acratia subelongata
  • †Acrocyathus
  • †Acrospirifer
    • †Acrospirifer murchisoni – or unidentified related form
  • †Acrothyra
  • †Actinostroma
  • †Acutichiton
    • †Acutichiton gracilis – type locality for species
    • †Acutichiton nevadensis – type locality for species
  • †Adamsoceras
    • †Adamsoceras isabelae
  • †Adelograptus
    • †Adelograptus antiquus
  • †Aechmina – tentative report
  • †Aesopomum
    • †Aesopomum varistriatus – or unidentified comparable form
  • †Agathammina
  • †Agnostocrinus
    • †Agnostocrinus typus
  • †Agnostotes
    • †Agnostotes clavata – or unidentified comparable form
  • †Agnostus
  • Fossilized shell of the Middle Devonian ammonoid cephalopod, Agoniatites
    †Agoniatites
  • †Alaskospira
  • †Albertella
    • †Albertella aspinosa
    • †Albertella eiloitys
    • †Albertella fritizi – type locality for species
    • †Albertella fritzi – type locality for species
    • †Albertella highlandensis – type locality for species
    • †Albertella judithi
    • †Albertella lata – type locality for species
    • †Albertella schenki – type locality for species
    • †Albertella spectrensis
  • †Albertellina
    • †Albertellina aspinosa
  • †Albertelloides – type locality for genus
    • †Albertelloides kitae – type locality for species
    • †Albertelloides kitai – type locality for species
    • †Albertelloides mischi – type locality for species
    • †Albertelloides pandispinata – type locality for species
    • †Albertelloides rectimaginatus
    • †Albertelloides rectimarginatus
  • †Allorhynchus
    • †Allorhynchus heteropsis
  • †Allorisma – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Allosocrinus – tentative report
  • †Alokistocare
    • †Alokistocare alta – type locality for species
  • †Alokistocarella
    • †Alokistocarella brighamensis – or unidentified comparable form
  • †Altiocculus
    • †Altiocculus drumensis
  • †Alveolites
  • †Amaurotoma
    • †Amaurotoma zappa – type locality for species
  • †Ambocoelia
    • †Ambocoelia lobata – tentative report
    • †Ambocoelia recidiva
  • †Ambothyris
  • †Amecephalites – type locality for genus
    • †Amecephalites sundbergi – type locality for species
  • †Amecephalus
    • †Amecephalus arrojosensis
    • †Amecephalus laticaudum
  • †Amorphognathus
    • †Amorphognathus ordovicicus
  • †Amphilichas
    • †Amphilichas minganensis – or unidentified related form
  • †Amphipora
  • †Amphiscapha
    • †Amphiscapha intermedius – type locality for species
    • †Amphiscapha proxima
  • †Amplexizaphrentis
  • †Amplexoides
    • †Amplexoides radicosi – tentative report
  • †Amplifallotaspis
    • †Amplifallotaspis keni
  • †Ampyx – tentative report
  • †Ampyx
  • †Ampyxina
  • †Ampyxoides
    • †Ampyxoides occipitalis – or unidentified comparable form
  • †Anabarella
    • †Anabarella chelata – type locality for species
  • †Anabolotreta
    • †Anabolotreta glabra – type locality for species
    • †Anabolotreta mogota – type locality for species
  • † Ananias
    • †Ananias nevadensis
    • †Ananias seminudum – type locality for species
  • †Anaphilicas – tentative report
  • †Anastrophia
    • †Anastrophia magnifica – or unidentified comparable form
  • †Anataphrus
    • †Anataphrus martinensis
    • †Anataphrus spurius – or unidentified comparable form
  • †Ancillotoechia
    • †Ancillotoechia aptata
    • †Ancillotoechia pahranagatensis
  • †Anechocephalus
    • †Anechocephalus spinosus
    • †Anechocephalus trigranulatus
  • †Anemonaria
    • †Anemonaria delicatula
  • Angulocellularia
  • †Angulotreta
  • †Anisocyamus
  • †Anisopyge
  • †Anisotrypa
  • †Anisotrypella
  • †Anolotichia
  • Restorative model of the Cambrian arthropod Anomalocaris
    †Anomalocaris
  • †Anomalorthis
    • †Anomalorthis fascicostatus – or unidentified comparable form
    • †Anomalorthis fascicostellatus
    • †Anomalorthis lonensis
    • †Anomalorthis nevadensis
    • †Anomalorthis oklahomensis
    • †Anomalorthis resoi
    • †Anomalorthis utahensis
  • †Anomphalus
  • †Anoplia
    • †Anoplia elongata
  • †Anostylostroma
  • †Antagmus
    • †Antagmus arenosus – type locality for species
  • †Anthaspidella
    • †Anthaspidella clintoni
  • †Anthraconeilo – tentative report
  • †Anthracospirifer
    • †Anthracospirifer bifurcatus – or unidentified comparable form
    • †Anthracospirifer birdspringensis
    • †Anthracospirifer curvilateralis
    • †Anthracospirifer newberryi
    • †Anthracospirifer occiduus
    • †Anthracospirifer opimus
    • †Anthracospirifer pellaensis – or unidentified related form
  • †Anticostia
    • †Anticostia fastigata
    • †Anticostia fastigiata
    • †Anticostia festigata
    • †Anticostia lata
    • †Anticostia macgregorae
    • †Anticostia tenuissima
    • †Anticostia thorsteinssoni
    • †Anticostia uniformis
  • †Antiquatonia
    • †Antiquatonia coloradoensis
    • †Antiquatonia elyensis
    • †Antiquatonia hermosana
    • †Antiquatonia morrowensis
    • †Antiquatonia portlockianus
  • †Antirhynchonella
  • †Antistrix
    • †Antistrix invicta
  • †Apachella
  • †Apachia
    • †Apachia butlerensis
  • †Aparchites
  • †Apatokephalus
    • †Apatokephalus finalis – tentative report
  • †Apatolichas
    • †Apatolichas jukesi – or unidentified comparable form
  • †Aphelaspis
    • †Aphelaspis brachyphasis – type locality for species
    • †Aphelaspis buttsi
    • †Aphelaspis haguei
    • †Aphelaspis subditus
  • †Aphelotoxon
    • †Aphelotoxon acuminata
    • †Aphelotoxon marginata
    • †Aphelotoxon punctata
  • †Apheoorthis
  • †Aphroidophyllum
    • †Aphroidophyllum inceptor – type locality for species
  • †Aploconus
    • †Aploconus lafustei – type locality for species
  • †Aporthophyla
    • †Aporthophyla typa
    • †Aporthophyla typica
  • †Appendispinograptus
    • †Appendispinograptus leptothecalis
    • †Appendispinograptus longispinus
    • †Appendispinograptus supernus
  • †Arceodomus
    • †Arceodomus glabrata
    • †Arceodomus langenheimi
  • †Archaediscus
    • †Archaediscus krestovnikovi
    • †Archaediscus moelleri – or unidentified loosely related form
  • Fossilized shell and spines of the Late Devonian-Permian sea urchin Archaeocidaris
    †Archaeocidaris
  • †Archaeocothurnus
    • †Archaeocothurnus goshutensis – type locality for species
  • †Archaeocyathus
    • †Archaeocyathus atlanticus – or unidentified comparable form
  • †Archaeophiomusium
    • †Archaeophiomusium bispinosum – type locality for species
    • †Archaeophiomusium burrisi
  • †Archaeorthis
    • †Archaeorthis costellatus
    • †Archaeorthis elongata
    • †Archaeorthis elongatus
  • †Archaeoscyphia
    • †Archaeoscyphia bassleri – type locality for species
    • †Archaeoscyphia eganensis – type locality for species
    • †Archaeoscyphia pannosa – type locality for species
    • †Archaeoscyphia pulchra
    • †Archaeoscyphia rossi – type locality for species
  • †Archaeosycon
    • †Archaeosycon copulatus
  • †Archinacella – tentative report
  • †Arcochiton
    • †Arcochiton richardsoni – type locality for species
  • †Areostrophia
    • †Areostrophia rara
  • †Arroyocrinus
    • †Arroyocrinus brachiatus
    • †Arroyocrinus popenoei
  • †Arrythmocricus
    • †Arrythmocricus mcdamensis
  • †Asaphellus
    • †Asaphellus eudocia – or unidentified comparable form
    • †Asaphellus riojanus
  • †Asarcophyllum
    • †Asarcophyllum ramosum
  • †Ascopora
  • †Asgardaspira
    • †Asgardaspira measuresae
    • †Asgardaspira yochelsoni
  • †Asphaltina
  • †Aspidagnostus
    • †Aspidagnostus laevis – type locality for species
    • †Aspidagnostus rugosus
  • †Astartella
    • †Astartella subquadrata
  • †Asthenophyllum
    • †Asthenophyllum orthoseptatum – tentative report
  • †Astreptodictya
  • †Astroproetus
  • †Asymphylotoechia
    • †Asymphylotoechia nolani
  • †Atelelasma
    • †Atelelasma primotica
  • †Athabaskia
  • †Athyridacid
  • †Athyris
    • †Athyris angelica
    • †Athyris angelicoidea
    • †Athyris lamellosa
  • †Atopocystis – type locality for genus
    • †Atopocystis mucronata – type locality for species
  • †Atrypa
    • †Atrypa nevadana
    • †Atrypa parva – or unidentified comparable form
    • †Atrypa reticularis
  • †Atrypina
    • †Atrypina erugata
    • †Atrypina rugata
    • †Atrypina simpsoni – type locality for species
  • †Atrypoidea
  • †Aulacoparia
    • †Aulacoparia venta – or unidentified comparable form
  • †Aulocystis
  • †Aulopora
  • †Auloprotonia
  • †Australispongia
    • †Australispongia compressa – type locality for species
  • †Australophyllum – tentative report
  • Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten
    †Aviculopecten
    • †Aviculopecten affinis
    • †Aviculopecten eurekensis
    • †Aviculopecten haguei
    • †Aviculopecten pintoensis
  • †Aviculopinna
    • †Aviculopinna consimilis – or unidentified comparable form
    • †Aviculopinna peracuta – tentative report
  • †Avonia
  • †Axofistulophyllum
    • †Axofistulophyllum conulus – tentative report
    • †Axofistulophyllum convexum

B
  • †Bactroceras
    • †Bactroceras angustisiphonatum
  • Bairdia
    • †Bairdia confragosaeformis – or unidentified comparable form
    • †Bairdia fabaeformis – or unidentified comparable form
    • †Bairdia manifesta
  • †Bairdiacypris
    • †Bairdiacypris anteroangulosa
    • †Bairdiacypris martinae
    • †Bairdiacypris quarziana
  • †Bairdiocypris
  • †Bakevellia
  • †Ballardina
    • †Ballardina simplex
  • †Baltoceras
    • †Baltoceras striatum – type locality for species
  • †Basilicus
    • †Basilicus mackeei
    • †Basilicus mckeei
  • †Batenevia
  • †Bathymyonia
    • †Bathymyonia nevadensis – type locality for species
    • †Bathymyonia type locality for species A – informal
  • Illustration of a fossil of the Cambrian trilobite Bathynotus
    †Bathynotus
    • †Bathynotus holopygus
  • †Bathyocos
    • †Bathyocos housensis
  • †Bathyurellus
    • †Bathyurellus feitleri
  • †Bathyuriscus
    • †Bathyuriscus petalus
  • †Bathyurus
    • †Bathyurus acutus
    • †Bathyurus extans – or unidentified comparable form
    • †Bathyurus nevadensis
    • †Bathyurus sunbloodensis
  • †Batostomellina
  • †Beecheria
  • †Bekena
  • †Bellazona
    • †Bellazona bella
  • †Bellefontia
  • Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon
    †Bellerophon
    • †Bellerophon deflectus
    • †Bellerophon needlensis – type locality for species
    • †Bellerophon nevadensis
  • †Belodella
  • †Belodina
    • †Belodina confluens
    • †Belodina disponsa – or unidentified comparable form
    • †Belodina monitorensis
    • †Belodina ornata – or unidentified comparable form
  • †Benthamaspis
    • †Benthamaspis sera
  • †Bergaueria – tentative report
  • †Besselodus
    • †Besselodus borealis
  • †Beyrichia
  • †Bicarina
    • †Bicarina type locality for species A – informal
  • Life restoration of the Cambrian trilobite Biceratops
    †Biceratops – type locality for genus
    • †Biceratops nevadensis – type locality for species
  • †Biciragnostus
    • †Biciragnostus viator
  • †Bienvillia
    • †Bienvillia papulosa
  • †Bifida – tentative report
  • †Bighornia
  • † Bija
  • †Bilobia
  • †Bimuria
  • †Blastoidocrinus
    • †Blastoidocrinus nevadensis
  • †Blosyropsis
  • †Blountia
    • †Blountia bristolensis
  • †Bohemograptus
    • †Bohemograptus bohemicus
  • †Bojothyris
  • †Bolbocephalus – tentative report
  • †Bolbolenellus
    • †Bolbolenellus brevispinus – type locality for species
  • †Bonnia
    • †Bonnia caperata – type locality for species
    • †Bonnia copia – type locality for species
  • †Botomaella
  • †Boucotspira
    • †Boucotspira antelopensis
  • †Boultonia
    • †Boultonia heezeni – type locality for species
  • †Brachyprion
    • †Brachyprion geniculata
    • †Brachyprion mirabilis
  • †Brachyspirifer
    • †Brachyspirifer pinyonoides – type locality for species
  • †Bradyfallotaspis
  • †Bradyphyllum
    • †Bradyphyllum gracilium – type locality for species
  • †Bransonia
  • †Brasilioproductus
    • †Brasilioproductus welleri – or unidentified comparable form
  • †Brevibelus
    • †Brevibelus breviformis
  • †Breviphrentis
    • †Breviphrentis invaginata
    • †Breviphrentis invaginatus
    • †Breviphrentis johnsoni
    • †Breviphrentis kirki
    • †Breviphrentis magna
  • †Briantia
    • †Briantia mulleri
  • †Bristolia
    • †Bristolia anteros
    • †Bristolia bristolensis
    • †Bristolia fragilis
  • †Broeggeria – tentative report
  • †Bromella
    • †Bromella veritas
  • †Brongniartella
  • †Brunsia
  • †Budnaniella
    • †Budnaniella shenandoense – or unidentified comparable form
  • Life restoration of the Early Ordovician-Silurian trilobite Bumastus
    †Bumastus
  • †Buxtonia
    • †Buxtonia websteri – type locality for species
  • †Bynumina
    • †Bynumina globosa
  • †Bythicheilus
  • Bythocypris

C
  • †Caborcella
    • †Caborcella clinolimbata – type locality for species
    • †Caborcella ganosa
    • †Caborcella granosa
    • †Caborcella pseudaulax
    • †Caborcella reducta
  • †Cabrieroceras
    • †Cabrieroceras crispiforme – or unidentified related form
  • †Calathium
  • †Calcispheara
  • †Calcitornella
  • †Calcivertella
  • †Caliendrum – or unidentified related form
  • †Calliprotonia
    • †Calliprotonia spinula – type locality for species
  • †Calstevenus – type locality for genus
    • †Calstevenus arcturus – type locality for species
  • †Calycalyptella
  • †Calycocoelia
    • †Calycocoelia murella – type locality for species
    • †Calycocoelia typicalis
  • †Calygirtyoceras
    • †Calygirtyoceras arcticum
  • †Calymene
  • †Calyptaulax
    • †Calyptaulax callirachis – or unidentified comparable form
  • †Camarotoechia
    • †Camarotoechia modica – or unidentified comparable form
    • †Camarotoechia pahranagatensis
    • †Camarotoechia vesper
  • †Camerella
  • Life restoration of the Cambrian arthropod Canadaspis (left)
    †Canadaspis
  • †Canadiphyllum
  • †Cancelloceras
    • †Cancelloceras elegans – or unidentified comparable form
  • †Cancrinella
  • †Caninia
    • †Caninia elkoensis – type locality for species
    • †Caninia goldcreekensis – type locality for species
    • †Caninia torquia
  • †Caninostrotion
  • †Canthylotreta
    • †Canthylotreta crista – type locality for species
  • †Cardiomorpha
  • †Carinagypa
  • †Carinamala
    • †Carinamala longispina – type locality for species
  • †Carlinastraea
    • †Carlinastraea halysitoides
  • †Carolinites
    • †Carolinites ekphymosus – or unidentified comparable form
    • †Carolinites genacinaca
    • †Carolinites killaryensis – or unidentified comparable form
    • †Carolinites sibiricus
  • †Carrickia
  • †Cassidirostrum
    • †Cassidirostrum eurekaensis – or unidentified comparable form
    • †Cassidirostrum vexans – type locality for species
  • †Catazona – type locality for genus
    • †Catazona rudilirata – type locality for species
  • †Catazone
    • †Catazone nevadana – type locality for species
  • †Catenipora
  • †Catoraphiceras
    • †Catoraphiceras foerstei
  • †Cavusgnathus
    • †Cavusgnathus gigantus
    • †Cavusgnathus lautus
    • †Cavusgnathus spathus
  • Fossil of the Cambrian trilobite Cedaria
    †Cedaria
    • †Cedaria brevifrons – type locality for species
  • †Celonocrinus
    • †Celonocrinus expansus
  • †Cenorhynchia
    • †Cenorhynchia type locality for species A – informal
    • †Cenorhynchia type locality for species B – informal
  • †Centropleura
  • †Ceratocephala – tentative report
  • †Ceratoikiscum – tentative report
  • †Ceratopea
    • †Ceratopea latiumbilicata – or unidentified comparable form
    • †Ceratopea lemonei
  • †Ceraurinella
  • †Ceraurinus
    • †Ceraurinus icarus
  • Fossil of the Middle-Late Ordovician trilobite Ceraurus
    †Ceraurus
  • †Cernuolimbus
    • †Cernuolimbus depressus
    • †Cernuolimbus granulosus
    • †Cernuolimbus laevifrons
    • †Cernuolimbus orygmatos
    • †Cernuolimbus semigranulosus
  • †Chaetetes
    • †Chaetetes milleporaceus
  • †Chalaroschwagerina
    • †Chalaroschwagerina ampla – type locality for species
    • †Chalaroschwagerina eximia – type locality for species
    • †Chalaroschwagerina formosa – type locality for species
    • †Chalaroschwagerina globularis – type locality for species
    • †Chalaroschwagerina inflata – type locality for species
    • †Chalaroschwagerina solita – type locality for species
    • †Chalaroschwagerina tumentis
  • Chancelloria
    †Chancelloria
  • †Chancia
    • †Chancia maladensis – tentative report
    • †Chancia venusta
    • †Chancia venuxa – or unidentified comparable form
  • †Chanciaopsis
    • †Chanciaopsis heteromorphos
  • †Charchaqia
    • †Charchaqia norini
  • †Chaulistomella – tentative report
  • †Chazydictya
  • †Cheilocephalus
    • †Cheilocephalus brachyops
    • †Cheilocephalus brevilobus
    • †Cheilocephalus granulosus
  • †Chonetes
    • †Chonetes euampygus
    • †Chonetes logani
  • †Choperella
    • †Choperella jeanette
  • †Choristites
    • †Choristites orbitus – type locality for species
  • †Cibolocrinus
    • †Cibolocrinus typus
  • †Cladochonus
    • †Cladochonus nevadensis – type locality for species
    • †Cladochonus shawi – type locality for species
  • Fossilized tooth of the shark Cladodus
    †Cladodus
  • †Cladopora
  • †Clathronema
    • †Clathronema batteni – type locality for species
  • †Clathrospira
  • †Cleiothyrdina
    • †Cleiothyrdina orbicularis
  • †Cleiothyridina
    • †Cleiothyridina angelicoides – or unidentified comparable form
    • †Cleiothyridina ciriacksi
    • †Cleiothyridina deroissyi
    • †Cleiothyridina elegans
    • †Cleiothyridina milleri
    • †Cleiothyridina orbicularis
    • †Cleiothyridina pecosii
    • †Cleiothyridina pecossi – or unidentified comparable form
    • †Cleiothyridina reticulata
    • †Cleiothyridina type locality for species A – informal
    • †Cleiothyridina type locality for species B – informal
  • †Clelandia – tentative report
  • †Climacammina
    • †Climacammina patula – or unidentified loosely related form
    • †Climacammina prisca – or unidentified loosely related form
  • †Climacograptus
    • †Climacograptus caudatus
    • †Climacograptus hastatus
    • †Climacograptus innotatus
    • †Climacograptus phyllophorus – or unidentified comparable form
    • †Climacograptus tridentatus
    • †Climacograptus tubuliferus
  • †Climaconus
  • †Clinopistha
    • †Clinopistha levis
  • †Clisiophyllum
  • †Clisospira
  • Cloacaspis
    †Cloacaspis
    • †Cloacaspis tesselata
  • †Clonopora – tentative report
  • †Cnemidactis
    • †Cnemidactis macroadambulacralatas – type locality for species
  • †Coelospira
    • †Coelospira concava
    • †Coelospira pseudocamilla – type locality for species
  • †Colaptomena
  • †Coledium
    • †Coledium therum
  • †Coleoloides
    • †Coleoloides inyoensis – type locality for species
  • †Colinispongia
    • †Colinispongia regularis – type locality for species
  • †Colpites
  • †Columnaria
  • †Comanchia
    • †Comanchia minus
  • Fossilized shell of the Late Devonian-Permian brachiopod Composita
    †Composita
    • †Composita apheles – or unidentified comparable form
    • †Composita gibbosa
    • †Composita mexicana
    • †Composita mira
    • †Composita ovata
    • †Composita parasulcata
    • †Composita subquadrata
    • †Composita subtilita
    • †Composita trilobata
    • †Composita trilobita
    • †Composita trinuclea
  • †Compsonema – type locality for genus
    • †Compsonema fragile – type locality for species
  • †Conchidium
  • †Conchopeltus
  • †Conocardium
  • †Conotoma
    • †Conotoma aurora
  • †Conotreta
  • Fossil of the Ordovician bryozoan Constellaria
    †Constellaria
  • †Contignatiospongia – type locality for genus
    • †Contignatiospongia nevadensis – type locality for species
  • †Conularia
  • †Cooleyella
    • †Cooleyella duffini
  • †Coosia
    • †Coosia longocula – type locality for species
  • †Cordillerastraea
    • †Cordillerastraea complexa
    • †Cordillerastraea nevadaensis – type locality for species
    • †Cordillerastraea nevadensis
  • †Cordylodus
    • †Cordylodus angulatus
    • †Cordylodus intermedius
    • †Cordylodus lindstomi
    • †Cordylodus proavus
  • †Cornuodus
  • Cornuspira
  • †Cornwallatia – type locality for genus
    • †Cornwallatia tabularia – type locality for species
  • †Cortezorthis
    • †Cortezorthis cortezensis – type locality for species
  • †Corydylodus
  • †Corynexochides
    • †Corynexochides prolatus
  • †Corynexochoides
    • †Corynexochoides prolatus
  • †Costatumulus
    • †Costatumulus altissima
  • †Costellarina
    • †Costellarina kaasai
    • †Costellarina plasi
  • †Costipelagiella
    • †Costipelagiella nevadense – type locality for species
  • †Costispirifer
  • †Cothurnocysts
    • †Cothurnocysts saukia – type locality for species
  • †Cranaena
  • †Crassialveolites
    • †Crassialveolites dubatalovi – or unidentified comparable form
  • †Crassifimbra
    • †Crassifimbra walcotti
  • †Cravenoceras
    • †Cravenoceras friscoense
  • †Crenispirifer – tentative report
  • †Crimites
    • †Crimites elkoensis – type locality for species
  • †Criteriognathus
    • †Criteriognathus eurekaensis
  • †Crurithyris
    • †Crurithyris calendae
    • †Crurithyris expansa
    • †Crurithyris fissa – type locality for species
    • †Crurithyris planoconvexa
    • †Crurithyris wampensis
  • †Cryptolithoides
    • †Cryptolithoides fittsi
    • †Cryptolithoides reticulatus
  • †Cryptolithus
  • †Cryptophyllus
  • †Ctenalosia
    • †Ctenalosia fixata
  • †Ctenodonta
  • †Culumbodina
    • †Culumbodina occidentalis
  • †Culumbodine
    • †Culumbodine penna
  • †Cuparius
    • †Cuparius cardilatus
  • †Curtoceras
  • †Cyathaxonia
  • †Cyathophycus
    • †Cyathophycus pseudoreticulatus – type locality for species
    • †Cyathophycus reticulatus – tentative report
  • †Cyathophyllum
    • †Cyathophyllum eurekaense
  • †Cybeloides
  • †Cybelopsis
  • †Cybelurus
    • †Cybelurus halo
  • †Cymbidium
  • †Cypricardella
    • †Cypricardella connata
    • †Cypricardella striata – or unidentified related form
  • †Cypricardinia
    • †Cypricardinia moorefieldana – or unidentified related form
  • †Cyptendoceras
    • †Cyptendoceras kirki – type locality for species
    • †Cyptendoceras rhythmicum – type locality for species
  • †Cyrtia
  • †Cyrtina
    • †Cyrtina caroline
    • †Cyrtina neogenes
    • †Cyrtina varia – or unidentified comparable form
  • †Cyrtinaella
    • †Cyrtinaella causa – type locality for species
  • †Cyrtinoides
    • †Cyrtinoides septata
  • †Cyrtoniodus
    • †Cyrtoniodus flexuosus
  • †Cyrtonotella
    • †Cyrtonotella fasciculata – or unidentified related form
  • †Cyrtorostra
  • Fossilized shells of the Middle-Late Devonian brachiopod Cyrtospirifer
    †Cyrtospirifer
    • †Cyrtospirifer breviposticus
    • †Cyrtospirifer portae – or unidentified comparable form
    • †Cyrtospirifer whitneyi
  • †Cyrtothoracoceras
  • †Cystiphylloides
  • †Cystodictya
  • †Cytherellina
    • †Cytherellina obusa

D
  • †Dactyletes
  • †Dactylogonia
    • †Dactylogonia vespertina
  • †Dactylotreta
    • †Dactylotreta elegantula – type locality for species
  • †Dalejina
  • Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites
    †Dalmanites
  • †Dapsilodus
    • †Dapsilodus obliquicostatus
  • †Daraelites
    • †Daraelites leonardensis
  • †Davidsonia
    • †Davidsonia antelopensis
  • †Deceptrix
  • †Dechenella
  • †Decoranewsomites
    • †Decoranewsomites angelicus
  • †Decoriconus
    • †Decoriconus fragilis
  • †Decorospira – type locality for genus
    • †Decorospira rigbyi – type locality for species
  • †Delamarella – type locality for genus
    • †Delamarella breispinaspis
    • †Delamarella brevispinaspis – type locality for species
  • †Delaria
    • †Delaria sevilloidia
    • †Delaria snowi
  • †Dellea – tentative report
    • †Dellea punctata
  • †Delmarella – type locality for genus
    • †Delmarella brevispinaspis – type locality for species
  • †Delocrinus
    • †Delocrinus graphicus – or unidentified related form
    • †Delocrinus vastus
  • †Delthyris
  • †Denayella
    • †Denayella housei – type locality for species
  • Dentalium
  • †Derbyia
    • †Derbyia crassa
    • †Derbyia subcircularis
    • †Derbyia sulca
    • †Derbyia wabaunseensis
  • †Desatrypa
    • †Desatrypa copperi
  • †Desmoinesia
    • †Desmoinesia ingrata
    • †Desmoinesia nana
  • †Desmorthis
    • †Desmorthis costata
    • †Desmorthis crassus
    • †Desmorthis nevadensis
    • †Desmorthis planus
  • †Devonalosia – tentative report
  • †Devonoproductus
    • †Devonoproductus hallanus
    • †Devonoproductus minimus – or unidentified comparable form
  • †Diacanthaspis – tentative report
  • †Dianulites
  • †Diaphragmaphyllum
    • †Diaphragmaphyllum grossum – or unidentified related form
  • †Diaphragmus
    • †Diaphragmus phillipsi
  • †Dicanthopyge
    • †Dicanthopyge convergens
    • †Dicanthopyge quadrata
    • †Dicanthopyge reductus
  • †Dicellograptus
    • †Dicellograptus alector – type locality for species
    • †Dicellograptus anceps
    • †Dicellograptus complanatus
    • †Dicellograptus divaricatus – or unidentified comparable form
    • †Dicellograptus minor
    • †Dicellograptus mirabilis
    • †Dicellograptus ornatus
    • †Dicellograptus sextans
    • †Dicellograptus tumidus
    • †Dicellograptus turgidus
  • †Diceratograptus
    • †Diceratograptus mirus
  • †Diceromyonia
    • †Diceromyonia ignota
  • †Dichognathus
    • †Dichognathus typica
  • †Dichogranthus
  • †Dicoelosia
    • †Dicoelosia biloba
  • †Dicranograptus
  • †Dictyoclostus
  • †Dictyonema
  • †Dictytonina
    • †Dictytonina pannula
  • Fossil of the Middle Ordovician graptolite Didymograptus
    †Didymograptus
    • †Didymograptus artus
    • †Didymograptus protobifidus
  • †Dielasma
    • †Dielasma diabloense – or unidentified comparable form
    • †Dielasma phosphoriense
  • †Dimegelasma
    • †Dimegelasma eurekensis – type locality for species
  • †Dimeropyge – tentative report
  • †Dimeropygiella
    • †Dimeropygiella caudanodosa
    • †Dimeropygiella ovata
  • †Dimorphoceras
  • †Dinorthis
    • †Dinorthis occidentalis
  • †Diparelasma
    • †Diparelasma typicum – or unidentified comparable form
  • †Diplocyathellus
  • Cambrian graptolite Diplograptus
    †Diplograptus
    • †Diplograptus rarithecatus
    • †Diplograptus rigidus
  • †Diplotrypa
  • †Discomyorthis
    • †Discomyorthis musculosa
  • †Disphyllum
  • †Distacodus
    • †Distacodus symmetricus
  • †Distomodus
  • †Divaricospongia – type locality for genus
    • †Divaricospongia dilata – type locality for species
  • †Dokimocephalus
    • †Dokimocephalus pernasutus
  • †Dolerorthis
    • †Dolerorthis flabellites
  • †Donaldiella
    • †Donaldiella cicelia
  • †Donaldina
  • †Donaldospira
    • †Donaldospira geminocarinata – or unidentified comparable form
  • †Dorlodotia
  • †Dorytreta – tentative report
  • †Drepanodus
    • †Drepanodus subarcuatus
  • †Drepanoistodus
    • †Drepanoistodus deltife
    • †Drepanoistodus suberectus
  • †Droharhynchia
    • †Droharhynchia intermissa
  • †Dunbarella
  • †Dunderbergia
    • †Dunderbergia anyta
    • †Dunderbergia bigranulosa
    • †Dunderbergia brevispina
    • †Dunderbergia calculosa
    • †Dunderbergia nitida
    • †Dunderbergia polybothra
    • †Dunderbergia variagranula
  • †Durhamina
    • †Durhamina cordillerensis – type locality for species
    • †Durhamina moormanensis – type locality for species
    • †Durhamina primitiva – type locality for species
    • †Durhamina richi
    • †Durhamina snyderi – type locality for species
    • †Durhamina sublaeve
  • †Dvorakia
  • †Dyoros
    • †Dyoros nevadaensis – type locality for species
    • †Dyoros type locality for species A – informal
  • †Dyscritella
    • †Dyscritella acanthostylia – type locality for species
  • †Dyticospirifer – type locality for genus
    • †Dyticospirifer mccolleyensis – type locality for species
  • †Dytremacephalus
    • †Dytremacephalus asperaxis
    • †Dytremacephalus granulosus

E
  • †Earlandia
    • †Earlandia vulgaris
  • †Ecculiomphalus
    • †Ecculiomphalus harrisae
  • †Eccyliopterus
  • Echidnina
    • †Echidnina bengstoni – type locality for species
  • †Echinalosia
    • †Echinalosia type locality for species A – informal
  • †Echinaria
    • †Echinaria knighti
    • †Echinaria semipunctata – or unidentified comparable form
  • †Echinauris
    • †Echinauris magna
    • †Echinauris subhorrida – type locality for species
  • †Echinocoelia
    • †Echinocoelia careocamera
    • †Echinocoelia denayensis
    • †Echinocoelia williamsi
  • †Echinoconchus
    • †Echinoconchus biseriatus – or unidentified related form
    • †Echinoconchus elegans
    • †Echinoconchus semipunctatus
    • †Echinoconchus vittatus – or unidentified related form
  • †Ecnomiophyllum – type locality for genus
    • †Ecnomiophyllum fascis – type locality for species
    • †Ecnomiophyllum merriami – type locality for species
    • †Ecnomiophyllum simpsoni
  • †Ectenonotus
    • †Ectenonotus westoni – or unidentified comparable form
    • †Ectenonotus whittingtoni
    • †Ectenonotus whittingtonia
  • †Ectenotus – tentative report
  • †Ectoprimitia
  • †Edmondia
  • †Egania – type locality for genus
    • †Egania typicalis – type locality for species
  • †Egorovia
    • †Egorovia longituda – or unidentified related form
  • †Egosiella – tentative report
  • †Ehmaniella
    • †Ehmaniella angustigena
    • †Ehmaniella fronsplanata
  • †Ekeraspis
    • †Ekeraspis floweri
    • †Ekeraspis nevadensis
  • †Ekteinocrinus
    • †Ekteinocrinus battleshipensis
  • †Ekvasophyllum
  • †Elassocrinus
    • †Elassocrinus cyathus
    • †Elassocrinus delicatulus
    • †Elassocrinus inornatus
    • †Elassocrinus nodosus
  • †Elburgia
    • †Elburgia granulosa
    • †Elburgia quinnensis
  • †Eleutherokomma
    • †Eleutherokomma impennis – or unidentified comparable form
  • †Eleutherospira
    • †Eleutherospira sinistralis – type locality for species
  • †Elibatocrinus
    • †Elibatocrinus elongatus
  • †Eliorhynchus
    • †Eliorhynchus castanea
    • †Eliorhynchus nevadensis
  • †Elita
  • †Elkoceras – type locality for genus
    • †Elkoceras volborthi – type locality for species
  • †Elliottella
    • †Elliottella multicostata – or unidentified related form
  • †Elrathina
    • †Elrathina antiqua
    • †Elrathina wheelera
  • †Elvania
  • †Elvinia
    • †Elvinia roemeri
  • †Elviniella
    • †Elviniella laevis
  • †Elythyna
  • †Emanuella
    • †Emanuella meristoides
  • †Embolophyllum
    • †Embolophyllum carbonense – type locality for species
  • †Emmonsia
  • †Enantiosphenella
    • †Enantiosphenella cybele
  • †Encrinuroides
  • Fossil of the Middle Ordovician-Early Devonian trilobite Encrinurus
    †Encrinurus
  • †Endelocrinus
    • †Endelocrinus torus
  • †Endophyllum
  • †Endothyra
    • †Endothyra bowmani – or unidentified related form
    • †Endothyra excellens
    • †Endothyra maxima
    • †Endothyra pandorae
    • †Endothyra phrissa
    • †Endothyra prisca – or unidentified loosely related form
    • †Endothyra tantala
  • †Endothyranella
  • †Endothyranopsis
    • †Endothyranopsis compressus
    • †Endothyranopsis crassus
    • †Endothyranopsis scitula
  • †Endymionia
    • †Endymionia meeki – or unidentified comparable form
  • †Entactinia
    • †Entactinia spongia – tentative report
    • †Entactinia sublata – or unidentified related form
  • †Enteletes
  • †Entogonites
  • †Eoangyomphalus
    • †Eoangyomphalus klapperi – type locality for species
  • †Eochonetes
  • †Eoendothyrandopsis
  • †Eoendothyranopsis
    • †Eoendothyranopsis donica
    • †Eoendothyranopsis ermakiensis
    • †Eoendothyranopsis robusta – or unidentified related form
    • †Eoendothyranopsis scitula
  • †Eofallotaspis – or unidentified comparable form
  • †Eofalodus
    • †Eofalodus brevis
  • †Eofletcheria
  • †Eoglossinotoechia
  • †Eokochaspis – type locality for genus
    • †Eokochaspis cabinensis
    • †Eokochaspis delamarensis
    • †Eokochaspis granulosa – type locality for species
    • †Eokochaspis longspina
    • †Eokochaspis metalaspis – type locality for species
    • †Eokochaspis nodosa – type locality for species
    • †Eokochaspis piochensis
  • †Eoleperditia
    • †Eoleperditia bivia
  • †Eolissochonetes
    • †Eolissochonetes keyesi
  • †Eomarginifera
    • †Eomarginifera haydensis – or unidentified comparable form
  • †Eoparafusulina
    • †Eoparafusulina bellula – type locality for species
    • †Eoparafusulina concisa – type locality for species
    • †Eoparafusulina spissa
  • †Eoplectodona
  • †Eoplectodonta
    • †Eoplectodonta alternata
  • †Eopteria
    • †Eopteria richardsoni – or unidentified comparable form
  • †Eoptychoparia – or unidentified comparable form
    • †Eoptychoparia piochensis
  • †Eorobergia
  • †Eoschubertella
  • †Eoschuchertella
  • †Eospirifer
  • †Eostaffella
    • †Eostaffella tortula
  • †Eotetragraptus
  • †Eothele
    • †Eothele spurri
  • †Eotuberitina
  • †Epiphyton
    • †Epiphyton pencillatum – or unidentified comparable form
  • †Epistacheoides
  • †Eridoconcha
  • †Eridopora
  • †Eriella – tentative report
  • †Erisocrinus
    • †Erisocrinus longwelli
  • †Erixanium
    • †Erixanium brachyaxis
    • †Erixanium carinatum
    • †Erixanium multisegmentus
  • †Eroicaspira
    • †Eroicaspira simulatrix
  • †Esmeraldina
    • †Esmeraldina cometes – type locality for species
    • †Esmeraldina elliptica
    • †Esmeraldina lidensis – type locality for species
    • †Esmeraldina rowei
  • †Ethmophyllum
  • †Euconia – tentative report
  • †Eugonophyllum
  • †Eukrinaster
    • †Eukrinaster ibexensis
  • †Eumetria
    • †Eumetria acutirostra – or unidentified comparable form
  • †Eumorphoceras
    • †Eumorphoceras bisulcatum
  • Fossilized shell of the Silurian-Permian sea snail Euomphalus
    †Euomphalus
    • †Euomphalus latus
    • †Euomphalus pancakensis – type locality for species
  • †Euphemites
    • †Euphemites crenulatus
    • †Euphemites kingi
    • †Euphemites nevadensis – type locality for species
  • †Euphemitopsis
    • †Euphemitopsis subpapillosa
  • †Euptychaspis
  • †Eurekablastus – type locality for genus
    • †Eurekablastus ninemilensis – type locality for species
  • †Eurekaspirifer – type locality for genus
    • †Eurekaspirifer pinyonensis
  • †Eurekia
  • †Eurychilina
  • †Euryzone – tentative report
  • †Eustypocystis
    • †Eustypocystis minor
  • †Evanescirostrum
    • †Evanescirostrum glabraventra
  • †Exochops
    • †Exochops portlocki
  • †Exocrinus
    • †Exocrinus moorei

F
  • †Faberophyllum
  • †Fallotaspidia
  • Illustration of a fossil of the Cambrian trilobite Fallotaspis
    †Fallotaspis
    • †Fallotaspis bondoni – or unidentified comparable form
  • †Favosites
  • †Fenestella
    • †Fenestella stocktenensis
  • †Fenestrellina
  • †Fenestrocyathus
  • †Ferganella
    • †Ferganella borealis
  • †Fieldaspis
    • †Fieldaspis bilobata
    • †Fieldaspis celer
    • †Fieldaspis superba
  • †Fimbrinia
    • †Fimbrinia plummeri
  • †Finkelnburgia – tentative report
    • †Finkelnburgia scenidioides – or unidentified comparable form
  • †Fistellaspongia – type locality for genus
    • †Fistellaspongia inclinata – type locality for species
  • †Fistulipora
    • †Fistulipora bifoliatus
  • †Fistutlipora
    • †Fistutlipora lamellatis
  • †Flabellitesia
    • †Flabellitesia flabellites
  • †Flexaria
    • †Flexaria arkansana
  • Front (left) and right side (right) views of an enrolled fossil of the Middle Ordovician-Silurian trilobite Flexicalymene
    †Flexicalymene
  • †Fomichevella
    • †Fomichevella nevadensis – type locality for species
    • †Fomichevella schrenki
    • †Fomichevella waltersi – type locality for species
  • †Fremontia
  • †Freontia
  • †Fritzaspis
    • †Fritzaspis generalis
    • †Fritzaspis ovalis
  • †Fusulinella
    • †Fusulinella acuminata
    • †Fusulinella fugax

G
  • †Gabelia – type locality for genus
    • †Gabelia fascicula
    • †Gabelia giganta
    • †Gabelia intermedia – type locality for species
    • †Gabelia pedunculus – type locality for species
  • †Gacella – tentative report
  • †Gallatinospongia
    • †Gallatinospongia conica
  • †Gamachignathus
    • †Gamachignathus ensifer
  • †Gasterocoma
    • †Gasterocoma bicaula – type locality for species
  • †Gattendorfia – tentative report
  • †Genalaticurus
    • †Genalaticurus genalatus – or unidentified comparable form
  • †Gennaeocrinus
    • †Gennaeocrinus maxwelli – type locality for species
  • Fossil of the Early-Late Ordovician trilobite Geragnostus
    †Geragnostus
  • †Geraldinella
  • †Geranocephalus
    • †Geranocephalus truncatus
  • †Girtyana
    • †Girtyana stellara – type locality for species
  • †Girtyoceras
    • †Girtyoceras hamiltonense – type locality for species
  • †Girtypecten
  • †Girvanella
  • †Glabrocingulum
    • †Glabrocingulum quadrigatum
  • †Glaphurochiton – tentative report
  • †Glaphurus
  • †Glaphyraspis
    • †Glaphyraspis ornata
  • †Glassia
    • †Glassia triangulata
  • †Globivalvulina – tentative report
  • †Globoendothyra
    • †Globoendothyra tomiliensis – or unidentified related form
  • Glomospira
  • †Glossopleura
    • †Glossopleura lodensis
    • †Glossopleura tuta
    • †Glossopleura walcotti
  • †Glyphaspis
    • †Glyphaspis concavus
  • †Glyptagnostus
  • †Glyptograptus
  • †Glyptomena – tentative report
  • †Glyptorthis
  • †Glyptospira
    • †Glyptospira arelela – type locality for species
  • †Gnathodus
    • †Gnathodus muricatus
    • †Gnathodus simplex – or unidentified related form
  • †Gogia
    • †Gogia longidactylus
  • †Goldfieldia – type locality for genus
    • †Goldfieldia pacifica – type locality for species
  • †Goniasma
  • Fossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod Goniatites
    †Goniatites
    • †Goniatites americanus
    • †Goniatites deceptus
    • †Goniatites eganensis – type locality for species
    • †Goniatites sowerbyi – type locality for species
  • †Goniophrys – tentative report
  • †Goniotelina
    • †Goniotelina ensifer
  • †Goniotrypa
  • †Gosseletina – tentative report
  • †Grabaulites
    • †Grabaulites jacksoni – or unidentified comparable form
  • †Gracianella
  • †Grammatodon
    • †Grammatodon politus
  • †Grandaurispina – or unidentified comparable form
    • †Grandaurispina type locality for species A – informal
  • †Grandinasus
    • †Grandinasus argentus
    • †Grandinasus auricampus
    • †Grandinasus patulus
  • †Granulifera
    • †Granulifera granulosa
  • †Graphiocrinus
    • †Graphiocrinus scopulus
  • †Graphiodactyllis
  • †Groomodiscus – type locality for genus
    • †Groomodiscus rossi – type locality for species
  • †Grovesella
    • †Grovesella nevadensis – type locality for species
    • †Grovesella tabasensis
  • †Gryphochiton
    • †Gryphochiton distinctus – type locality for species
  • †Grypophyllum
  • †Gypidula
    • †Gypidula loweryi
    • †Gypidula praeloweryi – type locality for species
    • †Gypidula pseudogaleata – or unidentified comparable form
  • †Gypidulina
    • †Gypidulina Sp. C – informal
  • Fossilized shell of the Carboniferous-Permian brachiopod Gypospirifer
    †Gypospirifer
    • †Gypospirifer infraplicus – or unidentified comparable form

H
  • †Hadrocephalites
    • †Hadrocephalites lyndonensis
    • †Hadrocephalites rhytidodes
  • †Hadropipetta
    • †Hadropipetta nevadensis – type locality for species
  • †Hadrorhynchia
    • †Hadrorhynchia sandersoni
  • †Hadrotreta
    • †Hadrotreta primaaea
  • Fossil of the Ordovician-Silurian tabulate coral Halysites
    †Halysites
  • †Hamarodus
    • †Hamarodus europaeus
  • †Hammatospira – type locality for genus
    • †Hammatospira bellula – type locality for species
  • †Hammatostroma
  • †Haplistion
    • †Haplistion aeluroglossa
    • †Haplistion sphaericum – or unidentified comparable form
  • †Hapsiphyllum
  • †Hardyoides
    • †Hardyoides mimicus
  • †Harklessia – type locality for genus
    • †Harklessia yuenglingensis – type locality for species
  • †Harpillaenus
    • †Harpillaenus rossi – type locality for species
  • †Hebetoechia
  • †Heckethornia
    • †Heckethornia bowiei
    • †Heckethornia hyndeae – type locality for species
    • †Heckethornia morrisseyi
    • †Heckethornia numani – type locality for species
  • †Hedeina
  • †Hedinaspis
    • †Hedinaspis regalis
  • †Hedraites – tentative report
  • †Heintzella
    • †Heintzella davydovi – type locality for species
    • †Heintzella playfordi – type locality for species
    • †Heintzella radiata – or unidentified comparable form
    • †Heintzella whitneyi
  • Life restoration of the Permian Chimaera relative Helicoprion
    †Helicoprion
    • †Helicoprion bessonowi
  • †Helicotis – tentative report
  • †Helicotoma
  • †Heliomera
    • †Heliomera albata – or unidentified comparable form
  • †Helminthochiton
  • †Hemiarges – tentative report
  • †Hemiptychina
    • †Hemiptychina quadricostata
  • †Heritschiella
    • †Heritschiella girtyi
  • †Hermatostroma
  • †Hesperinia
    • †Hesperinia kirki – type locality for species
  • †Hesperocoelia
    • †Hesperocoelia typicalis
  • †Hesperomena
    • †Hesperomena leptellinoidea
  • †Hesperonomia
    • †Hesperonomia antelopensis
    • †Hesperonomia crassa – or unidentified comparable form
    • †Hesperonomia iones
    • †Hesperonomia nemea – or unidentified comparable form
    • †Hesperonomia planidorsalis – or unidentified comparable form
  • †Hesperonomiella
    • †Hesperonomiella minor
  • †Hesperorthis
    • †Hesperorthis antelopensis – or unidentified comparable form
    • †Hesperorthis matutina – or unidentified comparable form
  • †Heteralosia
    • †Heteralosia slocomi
  • †Heterelasma
    • †Heterelasma type locality for species A – informal
  • †Heterocaninia – tentative report
    • †Heterocaninia langenheimi
  • †Heteropecten
    • †Heteropecten vanvleeti
  • †Heterophrentis
  • †Hexatractiella
    • †Hexatractiella nevadensis
  • †Highgatella
    • †Highgatella cordilleri
  • †Hillyardina – tentative report
  • †Hinganella
    • †Hinganella felderi – type locality for species
  • †Hintzeia
    • †Hintzeia celsaora
  • †Hiscobeccus
    • †Hiscobeccus capax
    • †Hiscobeccus gigas
  • †Holcocystis
    • †Holcocystis flexa
  • †Holmiella
    • †Holmiella falx
    • †Holmiella millerensis
  • †Homagnostus
    • †Homagnostus comptus – type locality for species
    • †Homagnostus lumidosus
    • †Homagnostus obesus
  • †Homograptus
  • †Homotelus
  • †Homotrypa
  • †Housia
    • †Housia ovata
  • †Howellella
    • †Howellella cycloptera
    • †Howellella textilis – or unidentified comparable form
  • †Hunnebergia – tentative report
  • †Hustedia
    • †Hustedia culcitula
    • †Hustedia elongata
    • †Hustedia gibbosa
    • †Hustedia miseri
    • †Hustedia mormoni – or unidentified comparable form
    • †Hustedia rotundi
    • †Hustedia stataria
  • †Hyalostelia
  • †Hyolithellus
    • †Hyolithellus insolitus
  • †Hyolithes
  • †Hyperchilarina
  • †Hypermecaspis
    • †Hypermecaspis kolouros
  • †Hypochilarina – tentative report
  • Life restoration of the Middle Ordovician trilobite Hypodicranotus
    †Hypodicranotus
  • †Hypothyridina
  • †Hypselentoma – tentative report
  • †Hypsiptycha
    • †Hypsiptycha anticostiensis – or unidentified comparable form
  • †Hysterolites
  • †Hystriculina
    • †Hystriculina hystricula
    • †Hystriculina type locality for species A – informal
    • †Hystriculina wabashensis
  • †Hystricurus
    • †Hystricurus oculilunatus – or unidentified comparable form

I
  • †Ianthinopsis
  • †Iapetognathus
    • †Iapetognathus sprakersi
  • †Ichodella
  • †Icriodus
    • †Icriodus angustus – or unidentified comparable form
    • †Icriodus brevis
    • †Icriodus difficilis
    • †Icriodus hesperius
    • †Icriodus latericrescens
    • †Icriodus nevadensis
    • †Icriodus norfordi
    • †Icriodus trojani
  • †Iddingsia
    • †Iddingsia robusta
    • †Iddingsia similis
  • †Idiomesus
  • †Idiostroma
  • †Idiostrophia
    • †Idiostrophia conciliata
    • †Idiostrophia lenticularis – type locality for species
    • †Idiostrophia nuda
    • †Idiostrophia paucicostata – or unidentified comparable form
    • †Idiostrophia valdari – type locality for species
  • Fossil of the Middle Ordovician trilobite Illaenus
    †Illaenus
    • †Illaenus alveatus – or unidentified comparable form
    • †Illaenus auriculatus
    • †Illaenus fraternus – or unidentified comparable form
    • †Illaenus oscitatus – tentative report
    • †Illaenus utahensis
  • †Ilmenia
  • †Imitoceras
  • †Indivisia – tentative report
  • †Inflatia
  • †Ingria
    • †Ingria cloudi
  • †Innitagnostus
    • †Innitagnostus inexpectans
  • †Intomodesma – tentative report
  • †Invertrypa
    • †Invertrypa subnuba
    • †Invertrypa talis – type locality for species
  • †Iridistrophia
  • †Irvingella
    • †Irvingella angustilimbatus
    • †Irvingella flohri
    • †Irvingella major
    • †Irvingella transversa
  • †Isbergia
  • †Ischyrophyma – tentative report
  • †Ischyrotoma
    • †Ischyrotoma juabensis
    • †Ischyrotoma stubblefieldi
  • †Isochilina
  • †Isograptus
  • †Isophragma – tentative report
  • †Isorthis
  • †Isoteloides
  • Fossil of the Middle-Late Ordovician giant trilobite Isotelus.
    †Isotelus
    • †Isotelus copenhagenensis
    • †Isotelus spurius
  • †Ivanovia

J
  • †Jedria
  • †Jeffersonia
  • †Jefina
  • †Johnsonetes – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Johnsonetes filistriata
  • †Juresania
    • †Juresania ovalis – or unidentified comparable form
    • †Juresania rectangularis – or unidentified comparable form

K
  • †Kainella
    • †Kainella flagricauda
  • †Kalimnasphaera
    • †Kalimnasphaera maculosa – or unidentified related form
  • †Kallimorphocrinus
    • †Kallimorphocrinus eaglei
  • †Kanoshia
    • †Kanoshia reticulata
  • †Kaskia
  • †Katuniella – tentative report
  • †Kawina
    • †Kawina wilsoni – type locality for species
  • †Kazakhoceras
    • †Kazakhoceras bylundi
  • †Keriocyathus – type locality for genus
    • †Keriocyathus arachnaius – type locality for species
  • †Kindbladia
    • †Kindbladia affinis
  • †Kingopora
    • †Kingopora ehrenbergi – or unidentified comparable form
    • †Kingopora inflata – type locality for species
    • †Kingopora wardlawiensa – type locality for species
  • †Kistocare
    • †Kistocare campbellensis – type locality for species
  • †Kitikamispira
    • †Kitikamispira minuitinodosa
  • †Kleopatrina
    • †Kleopatrina arcturusensis – type locality for species
    • †Kleopatrina ftatateeta
    • †Kleopatrina grandis
    • †Kleopatrina magnifica
    • †Kleopatrina simplex
  • †Kloedenellitina – tentative report
  • †Knightina
  • †Knoxiella – tentative report
  • †Kochaspis
    • †Kochaspis augusta
    • †Kochaspis liliana
  • †Kochiella
    • †Kochiella augusta
    • †Kochiella brevaspis
    • †Kochiella maxeyi
  • †Kochiellina
    • †Kochiellina groomensis
    • †Kochiellina janglensis
  • †Kochina
    • †Kochina walcotti – type locality for species
  • †Kochiproductus
  • †Komaspidella
    • †Komaspidella occidentalis – type locality for species
  • †Kometia – tentative report
  • †Komia
    • †Komia eganensis
  • †Komiella
    • †Komiella magnasulca
  • †Koneprusia
  • †Konickophyllum
  • †Koninckophyllum
  • Fossil of the Cambrian trilobite Kootenia
    †Kootenia
    • †Kootenia acicularis
    • †Kootenia aculacauda – type locality for species
    • †Kootenia brevispina
    • †Kootenia convoluta
    • †Kootenia crassa
    • †Kootenia crassinucha – type locality for species
    • †Kootenia dawsoni
    • †Kootenia germana
  • †Kormagnostella
    • †Kormagnostella advena
  • †Kozlowskia
    • †Kozlowskia haydenensis
    • †Kozlowskia kingi
    • †Kozlowskia splendens
  • †Kozlowskiellina
  • †Kozlowwkiella
    • †Kozlowwkiella lazarei
  • †Krausella
  • †Krotovia
    • †Krotovia globosa – or unidentified related form
    • †Krotovia knighti
  • †Kutorginella
    • †Kutorginella lasallensis
    • †Kutorginella pseudantiquatonia – type locality for species
  • †Kuvelousia
    • †Kuvelousia leptosa
  • †Kyrshabaktella

L
  • †Labiostria
    • †Labiostria westropi
  • †Lachnostoma
    • †Lachnostoma latucelsum
  • †Ladatheca
    • †Ladatheca cylindrica
  • †Ladjia
    • †Ladjia cordillera – type locality for species
    • †Ladjia russelli
    • †Ladjia saltica – or unidentified comparable form
  • †Ladogioides
    • †Ladogioides pax – or unidentified comparable form
  • †Laeogyra – or unidentified comparable form
  • †Lamellospira
  • †Landercyathus – type locality for genus
    • †Landercyathus lewandowskii – type locality for species
  • †Laticrura
    • †Laticrura heteropleura – or unidentified comparable form
  • †Latiendothyra
  • †Laurentoscandodus
    • †Laurentoscandodus triangularis
  • †Lebobienvillia
  • †Leeites
    • †Leeites leei – type locality for species
  • †Lehua
    • †Lehua argus – or unidentified related form
  • †Leiorhynchus
    • †Leiorhynchus carboniferum
    • †Leiorhynchus hippocastanea
    • †Leiorhynchus miriam
    • †Leiorhynchus nevadensis – or unidentified comparable form
    • †Leiorhynchus rhabdotum – or unidentified comparable form
  • †Leiostegium
    • †Leiostegium goodwinensis
  • †Leiostrototropis – tentative report
  • †Lensotreta – type locality for genus
    • †Lensotreta perplexa – type locality for species
  • †Leonardoceras
    • †Leonardoceras parvum
  • Fossil of the Late Ordovician-Middle Devonian trilobite Leonaspis
    †Leonaspis
  • †Leperditella
    • †Leperditella incisa – or unidentified comparable form
    • †Leperditella tumida – or unidentified comparable form
    • †Leperditella valida
  • †Lepetopsis
    • †Lepetopsis franae – type locality for species
  • †Lepidocyclus
  • †Lepidoleptaena
  • †Leptaena
    • †Leptaena acuticuspidata – or unidentified comparable form
    • †Leptaena ordovicica – or unidentified comparable form
  • †Leptaenisca
  • †Leptathyris
    • †Leptathyris circula
    • †Leptathyris index
    • †Leptathyris obsolescens
  • †Leptella
    • †Leptella austrina – type locality for species
    • †Leptella nevadensis
  • †Leptellina
    • †Leptellina occidentalis
  • †Leptobolus – tentative report
  • †Leptocoelia
    • †Leptocoelia murphyi – type locality for species
  • †Leptocoelina
    • †Leptocoelina squamosa – type locality for species
  • †Leptodesma
  • †Leptomphalus
    • †Leptomphalus arcturus – type locality for species
  • †Leptostrophia
    • †Leptostrophia beckii – or unidentified comparable form
    • †Leptostrophia inequicostella
  • †Lesueurilla
  • †Leurosina
    • †Leurosina sinesulca
  • †Levenea
    • †Levenea fagerholmi – type locality for species
    • †Levenea navicula – type locality for species
  • †Lichenaria
  • †Licnocephala
    • †Licnocephala cavigladius
  • †Lidaconus – type locality for genus
    • †Lidaconus palmettoensis – type locality for species
  • †Limipecten
  • †Lingula
    • †Lingula carbonaria – or unidentified comparable form
  • Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella
    †Lingulella
  • †Linipalus
    • †Linipalus magnispinus – or unidentified related form
  • †Linnarssonella
  • †Linnarssonia
  • †Linoproductus
    • †Linoproductus ovata
    • †Linoproductus planiventralis
    • †Linoproductus prattenianus
    • †Linoproductus prottenianus
  • †Liocheina
  • †Liricamera
    • †Liricamera nevadensis
  • †Lissatrypa – tentative report
  • †Lissochonetes
  • †Lissocoelia
    • †Lissocoelia cylindrica – type locality for species
    • †Lissocoelia ramosa
  • †Listroa
    • †Listroa toxoura
  • †Lithostrotionella
    • †Lithostrotionella castelnaui
  • †Litocephalus
    • †Litocephalus bilobatus
    • †Litocephalus granulomarginatus
    • †Litocephalus magnus
    • †Litocephalus verruculapeza
  • †Lobocorallium
    • †Lobocorallium trilobatum
  • †Lobosiphon
  • †Lodanaria – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Lodanaria floryi
  • †Loganograptus
  • †Lomatopisthia – tentative report
  • Fossil of the Ordovician trilobite Lonchodomas
    †Lonchodomas
  • †Lophonema
    • †Lophonema frydai
  • †Lophophyllum – tentative report
  • †Lophospira
    • †Lophospira perangulata
  • †Lotagnostus
    • †Lotagnostus trisectus – or unidentified comparable form
  • †Loxonema
    • †Loxonema walcotti – type locality for species
  • †Lunulazona
  • †Lutulentus
    • †Lutulentus muralspineus
  • †Lyrielasma
  • †Lytvophyllum – tentative report

M
  • †Macannaia
    • †Macannaia maladensis
  • †Macgeea
  • †Machaeraria
  • †Mackenziecyathus
    • †Mackenziecyathus bukryi
  • †Macluritella – tentative report
    • †Macluritella gyroceras – or unidentified comparable form
  • †Maclurites
    • †Maclurites magnus
  • †Macrocyproides
  • †Madaraspis
    • †Madaraspis magnifica
  • †Malayaspira
    • †Malayaspira annulata
    • †Malayaspira hintzei
  • †Mametella
  • †Manzanella
  • †Marginia
    • †Marginia ivanovae – or unidentified comparable form
  • †Marginovatia
    • †Marginovatia catinulus
    • †Marginovatia eurekensis
  • †Martinia
  • †Martiniopsis – tentative report
  • †Mauryella
  • †Mccloudius
    • †Mccloudius parvus – type locality for species
  • †Mclearnites
    • †Mclearnites invasor
  • †Meekella
    • †Meekella attenuata
    • †Meekella striatocostata
  • †Meekopinna
    • †Meekopinna sagitta
  • †Meekopora
  • †Meekospira
  • †Megakozlowskiella
    • †Megakozlowskiella magnapleura – type locality for species
    • †Megakozlowskiella raricosta – or unidentified comparable form
  • †Megalaspidella – tentative report
  • †Megalaspides
  • †Megastrophia
    • †Megastrophia iddingsi
    • †Megastrophia transitans
  • Fossil of the Cambrian-Silurian trilobite Megistaspis
    †Megistaspis
  • †Meristella
    • †Meristella robertsensis
  • †Meristina
  • †Merriamites
    • †Merriamites eurekae
  • †Mesodouvillina
    • †Mesodouvillina varistriata – or unidentified comparable form
  • †Mesolobus
  • †Mesopholidostrophia – tentative report
  • †Mesoschubertella
    • †Mesoschubertella mullerriedi
  • †Mesotrypa
  • †Metabolograptus
    • †Metabolograptus persculptus
  • Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
    †Metacoceras
  • †Metadimorphoceras
    • †Metadimorphoceras richardsi – type locality for species
  • †Metaldetes
  • †Metaplasia
    • †Metaplasia paucicostata – or unidentified comparable form
  • †Metrionaxon
  • †Mexicaspis
    • †Mexicaspis difuntosensis
  • †Mexicella
    • †Mexicella antelopea
    • †Mexicella grandoculus – tentative report
    • †Mexicella granulata – type locality for species
    • †Mexicella mexicana
    • †Mexicella robusta
    • †Mexicella stator
  • †Michelinia
    • †Michelinia meekana
  • †Michelinoceras
    • †Michelinoceras wilsoni
  • †Microcardinalia
  • †Microcheinella
    • †Microcheinella peculiaris – or unidentified comparable form
  • †Microdoma
  • †Micromitra
  • †Microplasma
  • †Microryctocara
    • †Microryctocara nevadensis
  • †Milleratia – tentative report
  • †Millerella
    • †Millerella marblensis
  • †Mimatrypa
  • †Mimospira
    • †Mimospira helmhackeri – or unidentified related form
  • †Minervaecystis – tentative report
  • †Minupeltis
    • †Minupeltis conservator
  • †Minycardita – type locality for genus
    • †Minycardita sectilis – type locality for species
  • †Missisquoia
  • †Mizzia
    • †Mizzia yabei – or unidentified comparable form
  • †Moapacrinus
    • †Moapacrinus inornatus
    • †Moapacrinus rotundatus
†Modiolus
    • †Modiolus nevadensis
  • †Modiomorpha – tentative report
    • †Modiomorpha pintoensis
  • †Molybdocyathus – type locality for genus
    • †Molybdocyathus juvenilis – type locality for species
  • †Monocraterion
  • Fossils of the Early Devonian graptolite Monograptus
    †Monograptus
    • †Monograptus angustidens
    • †Monograptus birchensis
    • †Monograptus hercynicus
    • †Monograptus thomasi
    • †Monograptus uniformis
    • †Monograptus yukonensis
  • †Mononusphaericorhynchus
    • †Mononusphaericorhynchus sartenaeri
  • †Monotiopleura
  • †Montezumaspis
    • †Montezumaspis cometes
    • †Montezumaspis parallela
  • †Monticuliporella
  • †Moorefieldella
    • †Moorefieldella eurekensis
  • †Mooreoceras
  • †Morinorhynchus
  • †Morosa
    • †Morosa brevispina
    • †Morosa definita
    • †Morosa extensa
    • †Morosa longispina
  • †Morozoviella – type locality for genus
    • †Morozoviella curriensis – type locality for species
    • †Morozoviella praecurriensis – type locality for species
  • †Moscovicrinus
    • †Moscovicrinus bipinnatus
  • †Mourlonia
    • †Mourlonia type locality for species A – informal
  • †Mucophyllum
    • †Mucophyllum oliveri
  • †Multicostella
  • †Multioistodus
  • †Multithecopora
    • †Multithecopora hypatiae
  • †Murchisonia
    • †Murchisonia megathanae – type locality for species
    • †Murchisonia tillesae – type locality for species
  • †Mutationella – tentative report
  • †Myalina
  • †Mytilarca

N
  • †Nadiastrophia
  • †Nanicella
  • †Nanillaenus
  • †Nankinella
  • †Nanorthis
    • †Nanorthis hamburgensis
  • †Nardophyllum
  • Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis
    †Naticopsis
    • †Naticopsis glomerosa – type locality for species
    • †Naticopsis inornata
    • †Naticopsis kaibabensis
  • †Neaxon
  • †Neilsonia
    • †Neilsonia welleri – or unidentified comparable form
  • †Nemesa
    • †Nemesa cimex – type locality for species
  • †Neoarchaediscus
  • †Neochonetes
    • †Neochonetes acanthoporus
    • †Neochonetes dominus
    • †Neochonetes granulifer
  • †Neoeridotrypella
    • †Neoeridotrypella schilti – type locality for species
  • †Neomphyma
    • †Neomphyma karpinskiense
    • †Neomphyma nevadense
  • †Neomultithecopora
    • †Neomultithecopora mccutcheonae – type locality for species
  • †Neopanderodus
  • Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer
    †Neospirifer
    • †Neospirifer cameratus
    • †Neospirifer dunbari
    • †Neospirifer gorei
    • †Neospirifer goreii
    • †Neospirifer latus – or unidentified comparable form
    • †Neospirifer triplicatus
  • †Neosyringopora
    • †Neosyringopora multattenuata
  • †Neozeacrinus
    • †Neozeacrinus coronulus
    • †Neozeacrinus wanneri
  • Fossil of the Cambrian trilobite Nephrolenellus
    †Nephrolenellus
    • †Nephrolenellus geniculatus
    • †Nephrolenellus greniculatus – type locality for species
  • †Nervostrophia
  • †Nevadacrinus
    • †Nevadacrinus geniculatus
  • †Nevadaspira – type locality for genus
    • †Nevadaspira cooperi – type locality for species
  • †Nevadatubulus – type locality for genus
    • †Nevadatubulus dunfee – type locality for species
  • †Nevadella
    • †Nevadella eucharis
  • Fossil of the Cambrian trilobite Nevadia
    †Nevadia
    • †Nevadia parvoconica
    • †Nevadia weeksi
  • †Nevadoceras
    • †Nevadoceras steelei – type locality for species
  • †Nevadocoelia
    • †Nevadocoelia grandis
    • †Nevadocoelia pulchrata
    • †Nevadocoelia traini
    • †Nevadocoelia wistae
  • †Newberria
  • †Nicholsonella – tentative report
  • †Nicklesopora
    • †Nicklesopora avia
  • †Nicolella – tentative report
  • †Nicollidina
    • †Nicollidina brevis
  • †Nielsonia – or unidentified related form
  • †Nileus
    • †Nileus hesperaffinis
    • †Nileus scrutator – or unidentified related form
  • †Niobe
    • †Niobe quadraticaudata – or unidentified comparable form
  • †Niobella
  • †Nisusia – tentative report
  • †Noblella
    • †Noblella tremadociensis – type locality for species
  • †Normalograptus
    • †Normalograptus ajjeri
    • †Normalograptus angustus
    • †Normalograptus elegantulus
    • †Normalograptus extraordinarius
    • †Normalograptus myrniensis
    • †Normalograptus ojsuensis
  • †Nothorthis – tentative report
  • †Notopeltis
    • †Notopeltis orthometopa
  • †Nucleospira
    • †Nucleospira subsphaerica – type locality for species
  • †Nuculavus
    • †Nuculavus levatiformis
  • †Nuculoidea
  • †Nuculopsis
    • †Nuculopsis darlingensis – or unidentified comparable form
    • †Nuculopsis girtyi
    • †Nuculopsis levatiformis
  • †Nuia
  • †Nyctopora
  • †Nyella
    • †Nyella clinolimbata
    • †Nyella granosa
    • †Nyella immoderata
    • †Nyella plana
    • †Nyella rara

O
  • Illustration of fossils of the Cambrian brachiopod Obolella
    †Obolella
  • †Obolus
  • †Odontospirifer
    • †Odontospirifer type locality for species A – informal
  • †Oepikina
  • †Ogygopsis
    • †Ogygopsis batis
    • †Ogygopsis typicalis
  • †Oistodus
    • †Oistodus contractus
    • †Oistodus lanceolatus – or unidentified comparable form
  • †Oklahomacrinus
    • †Oklahomacrinus triangulus
  • †Olenaspella
    • †Olenaspella paucisegmenta
    • †Olenaspella regularis
    • †Olenaspella separata – type locality for species
  • Restoration of the Cambrian trilobite Olenellus
    †Olenellus
    • †Olenellus chiefensis – type locality for species
    • †Olenellus clarki
    • †Olenellus fowleri – type locality for species
    • †Olenellus fremonti – or unidentified comparable form
    • †Olenellus gilberti
    • †Olenellus howelli
    • †Olenellus multinodus
    • †Olenellus puertoblancoensis – tentative report
    • †Olenellus terminatus – type locality for species
  • Fossil preserving carbon films left by the legs and antennae of the Cambrian trilobite Olenoides
    †Olenoides
    • †Olenoides maladensis
    • †Olenoides steptoensis – type locality for species
  • †Olenus
    • †Olenus wilsoni
  • †Oligometopus
    • †Oligometopus contractus
  • †Ollenellus
    • †Ollenellus gilberti
  • †Omphalocirrus – tentative report
  • †Omphalotrochus
  • †Onchocephalites
    • †Onchocephalites claytonensis – type locality for species
  • †Onchocephalus
    • †Onchocephalus maior – or unidentified comparable form
    • †Onchocephalus major – or unidentified comparable form
    • †Onchocephalus palupus – type locality for species
  • †Oncochilus
  • †Onuphlonella – tentative report
  • †Onychoplecia – tentative report
  • †Ophioxenikos
    • †Ophioxenikos langenheimi
  • †Opikina
  • †Opipeuter
  • †Opisthotreta
    • †Opisthotreta indistincta – type locality for species
    • †Opisthotreta transversa – type locality for species
  • †Opsiosoryctocephalus – type locality for genus
    • †Opsiosoryctocephalus ophis – type locality for species
  • †Orbiculoidea
    • †Orbiculoidea capuliformis
    • †Orbiculoidea missouriensis
    • †Orbiculoidea moorefieldana – or unidentified related form
  • †Orecopia
    • †Orecopia mccoyi
  • †Oriostoma
    • †Oriostoma gerbaulti
  • †Oriskania
  • †Orthambonites
    • †Orthambonites bifurcatus
    • †Orthambonites decipiens – or unidentified comparable form
    • †Orthambonites dinorthoides
    • †Orthambonites eucharis
    • †Orthambonites mazourkaensis – or unidentified comparable form
    • †Orthambonites minisculus
    • †Orthambonites minusculus
    • †Orthambonites patulus
    • †Orthambonites paucicostatus
    • †Orthambonites subulata
  • †Orthidiella
    • †Orthidiella carinata
    • †Orthidiella costellata
    • †Orthidiella extensa
    • †Orthidiella longwelli
  • †Orthidium
    • †Orthidium bellulum
    • †Orthidium fimbriatum – or unidentified related form
  • †Orthis
  • †Orthoceras
  • †Orthograptus
    • †Orthograptus calcaratus
    • †Orthograptus truncatus
  • †Orthonema
  • †Orthonychia
    • †Orthonychia occidens
  • †Orthoretiolites
    • †Orthoretiolites hami
  • †Orthostrophella
    • †Orthostrophella monitorensis – type locality for species
  • †Orthostrophia
  • †Orthotetes
    • †Orthotetes kaskaskiensis
    • †Orthotetes occidentalis
  • †Orthotichia – tentative report
  • †Orthovertella
  • †Orulgania
  • †Oryctocephalina
    • †Oryctocephalina maladensis – tentative report
  • †Oryctocephalites
    • †Oryctocephalites claytonensis – type locality for species
    • †Oryctocephalites palmeri
    • †Oryctocephalites rasettii
    • †Oryctocephalites runcinatus
    • †Oryctocephalites typicalis
  • †Oryctocephalus
    • †Oryctocephalus americanus – type locality for species
    • †Oryctocephalus indicus
    • †Oryctocephalus maladensis
    • †Oryctocephalus nyensis
    • †Oryctocephalus orientalis
    • †Oryctocephalus primus
  • †Otarion
  • Life restoration of the Cambrian priapulid worm relative Ottoia
    †Ottoia
  • †Ottoseetaxis
  • †Oulodus
    • †Oulodus rohneri
    • †Oulodus ulrichi
  • †Ovatia
    • †Ovatia latior – or unidentified comparable form
    • †Ovatia nodosa
  • †Ovatoryctocara – tentative report
  • †Oxoplecia
    • †Oxoplecia monitorensis
    • †Oxoplecia nevadensis
  • †Oxyspira – type locality for genus
    • †Oxyspira murphyi – type locality for species
  • †Ozarkodina
    • †Ozarkodina hassi
    • †Ozarkodina oldhamensis – tentative report
    • †Ozarkodina raaschi
    • †Ozarkodina tenuis – or unidentified comparable form

P
  • †Pachyaspis
    • †Pachyaspis gallagari – type locality for species
    • †Pachyaspis longa – type locality for species
  • †Pachyconulus
    • †Pachyconulus parvalus
  • †Pachydictya
  • †Pachyfavosites
  • †Pachyphyllum
  • †Pachystrophia
  • †Pacificocoelia
    • †Pacificocoelia infrequens
  • †Paeckelmanella
  • †Paedeumias
    • †Paedeumias granulatus – type locality for species
    • †Paedeumias nevadensis – tentative report
  • †Paenebeltella
  • Fossil of the Cambrian trilobite Pagetia
    †Pagetia
    • †Pagetia arenosa
    • †Pagetia clytia
    • †Pagetia maladensis
    • †Pagetia mucrogena
    • †Pagetia prolata
    • †Pagetia resseri
    • †Pagetia rugosa
  • †Paladin
  • †Palaeocapulus
    • †Palaeocapulus piso
  • †Palaeocyclus
    • †Palaeocyclus eurylophus
  • †Palaeoneilo
    • †Palaeoneilo mcchesneyana
  • †Palaeophippium
    • †Palaeophippium octaramosum – type locality for species
  • †Palaeophyllum
  • †Palaeosphaera – type locality for genus
    • †Palaeosphaera micra – type locality for species
  • †Palaeostylus
  • †Palaeotextularia
    • †Palaeotextularia consobrina – or unidentified loosely related form
  • †Palaeotrifidus – type locality for genus
    • †Palaeotrifidus ballator – type locality for species
    • †Palaeotrifidus imbifurcus – type locality for species
  • †Palaeotripus
    • †Palaeotripus sexabrachiatus – type locality for species
  • †Paleofavosites
  • †Paleoneilo
  • †Palliseria – type locality for genus
    • †Palliseria longwelli – type locality for species
    • †Palliseria robusta
  • †Palmettaspis – type locality for genus
    • †Palmettaspis consorta – type locality for species
    • †Palmettaspis lidensis
    • †Palmettaspis parallela – type locality for species
  • †Paltodus
  • †Pamchonetes
    • †Pamchonetes macrostriatus
  • †Panacus – type locality for genus
    • †Panacus palmeri – type locality for species
  • †Pancus – type locality for genus
    • †Pancus palmeri – type locality for species
  • †Panderodus
    • †Panderodus feulneri
    • †Panderodus unicostatus
  • †Pandorinellian
    • †Pandorinellian linguiformis
  • †Pandorinellina
    • †Pandorinellina angustinpennatus – or unidentified comparable form
    • †Pandorinellina angustipennatus – or unidentified comparable form
    • †Pandorinellina exigua
    • †Pandorinellina expansa
    • †Pandorinellina linguiformis
    • †Pandorinellina steinhornensis
  • †Papiliophyllum
    • †Papiliophyllum murphyi
    • †Papiliophyllum vescum
  • †Paraantagmus
    • †Paraantagmus latus
  • †Parabellefontia
    • †Parabellefontia concinna – or unidentified comparable form
  • †Parabolablastus
    • †Parabolablastus elongatus – type locality for species
  • †Parabolinella
    • †Parabolinella hecuba
    • †Parabolinella tumifrons – or unidentified comparable form
  • †Paracaligelloides
  • †Parachaetes
  • †Parachonetes
    • †Parachonetes macrostriatus
  • †Paraconularia
  • †Paracrothyris
  • †Paracyclas
  • †Parafafallotaspis
  • †Parafallotaspis
  • †Parafusulina
  • †Paragloborilus
  • †Paraheritschioides
    • †Paraheritschioides californiense
    • †Paraheritschioides fergusonensis – type locality for species
    • †Paraheritschioides grandis
    • †Paraheritschioides nevadaensis – type locality for species
    • †Paraheritschioides stevensi
  • †Parahousia
    • †Parahousia constricta
    • †Parahousia subequalis
  • †Parahystricurus
  • †Parajuresania
    • †Parajuresania nebrascensis
  • †Paralbertella
    • †Paralbertella bosworthi
    • †Paralbertella bosworthy
  • †Paralenorthis
    • †Paralenorthis marshalli
  • †Parallelodon
    • †Parallelodon truncatus – or unidentified related form
  • †Paramillerella
    • †Paramillerella inflecta
    • †Paramillerella pressa
  • †Paranacyathus
  • †Paranevadella
  • †Paraorthograptus
    • †Paraorthograptus pacificus
    • †Paraorthograptus uniformis
  • †Paraparchites
    • †Paraparchites cyclopeus – or unidentified related form
    • †Paraparchites nickelsi – or unidentified comparable form
  • †Paraperrinites
    • †Paraperrinites subcumminsi – type locality for species
  • †Parapholidostrophia – type locality for genus
    • †Parapholidostrophia harperi – type locality for species
  • †Paraplegmatograptus
    • †Paraplegmatograptus uniformis
  • †Paraporcellia
    • †Paraporcellia rohri
  • †Parapoulsenia
    • †Parapoulsenia lata – or unidentified comparable form
  • †Parapugnax
    • †Parapugnax bactrianense – type locality for species
  • †Pararachnastraea
    • †Pararachnastraea illipahensis – type locality for species
    • †Pararachnastraea moormanensis – type locality for species
  • †Parareteograptus
    • †Parareteograptus parvus
    • †Parareteograptus sinensis
    • †Parareteograptus turgidus
  • †Pararhizophyllum – type locality for genus
    • †Pararhizophyllum parvulum – type locality for species
  • †Paraschmidtella – tentative report
  • †Parastringocephalus
  • †Parastrophina – tentative report
  • †Parathuramina
  • †Paratikhinella
  • †Parechidnina
    • †Parechidnina nevadensis – type locality for species
  • †Parenthatia
  • †Parethelocrinus
    • †Parethelocrinus rectilatus
  • †Pareuloma
  • †Parkaspis
    • †Parkaspis drumensis
  • †Parkula
    • †Parkula esmeraldina – type locality for species
  • †Paroistodus – tentative report
  • †Patellispongia
    • †Patellispongia brosiusae – type locality for species
    • †Patellispongia oculata
  • †Paterina
  • †Paterula
  • †Paterulus
  • †Patriaspirifer
    • †Patriaspirifer kobehana
  • †Paucicostella – tentative report
  • †Paucicrura
    • †Paucicrura cristifera
    • †Paucicrura subplana – or unidentified comparable form
  • †Paucispinifera – tentative report
  • Life restoration of the Cambrian trilobite Peachella
    †Peachella
    • †Peachella iddingsi
  • †Peelerophon – tentative report
  • †Pegmarhynchia
  • †Pelagiella
  • †Pelekygnathus
    • †Pelekygnathus linguiformis
    • †Pelekygnathus parawebbi
    • †Pelekygnathus pseudofoliatus
    • †Pelekygnathus xylus
  • †Pelekysgnathus
    • †Pelekysgnathus angustipennatus
    • †Pelekysgnathus eiflius
    • †Pelekysgnathus intermedius
    • †Pelekysgnathus linguiformis
    • †Pelekysgnathus parawebbi
    • †Pelekysgnathus pseudofoliatus
    • †Pelekysgnathus robusticostatus
    • †Pelekysgnathus trigonicus
  • †Peltabellia – tentative report
  • †Peniculauris
    • †Peniculauris ivesi
  • †Penniretepora
    • †Penniretepora oppositus
    • †Penniretepora trilineata
  • †Pentamerella
    • †Pentamerella davidsoni – or unidentified comparable form
    • †Pentamerella wintereri
  • †Pentamerifera
  • †Pentameroides
  • Fossilized shell of the Silurian-Middle Devonian brachiopod Pentamerus
    †Pentamerus
  • †Pentaxocrinus
    • †Pentaxocrinus quinarius
  • †Pentlandella
  • †Pentlandia
    • †Pentlandia merriami – type locality for species
  • †Pentremites
  • †Peraspis
    • †Peraspis erugata
  • †Pericyclus
    • †Pericyclus antelopensis – type locality for species
    • †Pericyclus filaris
  • †Perimestocrinus
    • †Perimestocrinus nevadensis
    • †Perimestocrinus oasis
  • †Periodon
    • †Periodon aculeatus – tentative report
  • †Perischoclonus
  • †Perissopliomera
    • †Perissopliomera maclachlani
  • †Perissopyge
    • †Perissopyge triangulata
  • †Permastraea
    • †Permastraea biseptata – type locality for species
    • †Permastraea buttensis – type locality for species
    • †Permastraea campophylloides
    • †Permastraea nevadensis – type locality for species
  • †Permocalculus
  • †Permophorus
  • †Pernopecten
  • Assemblage of fossils of the Cambrian trilobite Itagnostus interstrictus, until recently known as Peronopsis interstricta
    †Peronopsis
    • †Peronopsis amplaxis
    • †Peronopsis bonnerensis
    • †Peronopsis brighamensis
    • †Peronopsis fallax
    • †Peronopsis segmenta
  • †Perspicaris
  • †Peruvispira
    • †Peruvispira boreala – type locality for species
  • †Petalaxis
    • †Petalaxis elyensis – type locality for species
    • †Petalaxis exiguus
    • †Petalaxis mokomokensis – type locality for species
    • †Petalaxis occidentalis
  • †Petalocystites
  • †Petasmatherus
    • †Petasmatherus type locality for species A – informal
  • †Petigurus
    • †Petigurus inexpectatus
  • †Petrochus
  • †Petschoracrinus – tentative report
  • Fossil of the Late Ordovician-Late Devonian trilobite Phacops
    †Phacops
  • †Phalacroma
  • †Phanocrinus – tentative report
    • †Phanocrinus insolitus
  • †Phenacocyclas
  • †Phestia
    • †Phestia perumbonata
  • †Phillipsia
    • †Phillipsia peroccidens
  • †Pholidostrophia
  • †Phormograptus
    • †Phormograptus conectus
    • †Phormograptus connectus
  • †Phragmodus
    • †Phragmodus undatus
  • Spadella cephaloptera
    †Phragmophora
  • †Phragmorthis
    • †Phragmorthis antiqua – type locality for species
  • †Phragmostrophia
    • †Phragmostrophia merriami – type locality for species
  • †Phrenophoria
    • †Phrenophoria type locality for species A – informal
    • †Phrenophoria type locality for species B – informal
  • †Phricodothyris
  • †Phricodythyris
    • †Phricodythyris perplexa
  • †Phrycodothyris
    • †Phrycodothyris perplexa
  • †Phyllocystis
  • †Phyllodictya
    • †Phyllodictya crystallaria – or unidentified comparable form
  • Fossil of the Early Ordovician graptolite Phyllograptus
    †Phyllograptus
    • †Phyllograptus anna
  • †Physalidopisthia – tentative report
  • †Picnotreta
    • †Picnotreta lophocracenta
  • †Pilekia – tentative report
  • †Pinctus
  • Pinna
    • †Pinna innexpectans
  • †Pinnatulites
  • †Pinyonastraea
  • †Piochella
    • †Piochella peasleensis
  • †Plagioglypta
  • †Plagiura
    • †Plagiura extensa
    • †Plagiura minor
    • †Plagiura retracta
  • †Planoarchaediscus
  • †Platuzona – or unidentified comparable form
  • †Platybolbina
  • Fossilized shell of the Silurian-Early Triassic sea snail Platyceras
    †Platyceras
    • †Platyceras trojani – type locality for species
  • †Platycrinites
  • †Platycrinus – tentative report
  • †Platyschisma
  • †Platystrophia
  • †Platyterorhynchus
    • †Platyterorhynchus russelli
  • †Platyworthenia
  • †Platyzona
  • †Plaxocrinus
    • †Plaxocrinus piutae
  • †Plectatrypa
    • †Plectatrypa imbricata – or unidentified comparable form
  • †Plectelasma
    • †Plectelasma type locality for species A – informal
    • †Plectelasma type locality for species B – informal
  • †Plectodina
    • †Plectodina florida
    • †Plectodina tenuis
  • †Plectogyra
    • †Plectogyra irregularis
    • †Plectogyra tumesepta
    • †Plectogyra tumula
  • †Plectorthis
    • †Plectorthis obesa
    • †Plectorthis perplexus
  • †Plectotrophia – tentative report
  • †Pleiopleurina
    • †Pleiopleurina anticlastica
  • †Plethopeltis
    • †Plethopeltis arbucklensis – or unidentified comparable form
  • †Plethoschisma
    • †Plethoschisma grandis
  • Fossil of the Late Ordovician cystoid echinoderm Pleurocystites
    †Pleurocystites
  • †Pleurograptus
    • †Pleurograptus lui
  • †Pleurorima
    • †Pleurorima hoffmannae – type locality for species
  • †Pleurorthis
    • †Pleurorthis beattyensis
  • †Pleurosiphonella
  • †Plicatolina
  • †Plicocyathus
    • †Plicocyathus rozanovi
  • †Plicoplasia
    • †Plicoplasia cooperi
  • †Pliomeroides
  • †Pliomerops
    • †Pliomerops canadensis – or unidentified comparable form
  • †Plummericrinus
    • †Plummericrinus bulbosus
    • †Plummericrinus jelli
  • †Polidevcia
    • †Polidevcia arctura – type locality for species
    • †Polidevcia bellistriata
    • †Polidevcia obesa
  • †Poliella
    • †Poliella denticulata
    • †Poliella germana
    • †Poliella leipalox – type locality for species
    • †Poliella leipolox
    • †Poliella lomataspis
    • †Poliella ovala
    • †Poliella prima – or unidentified comparable form
  • †Poliellaites
    • †Poliellaites gloriosa
  • †Politicurus – tentative report
    • †Politicurus politus – or unidentified related form
  • †Polusocrinus
    • †Polusocrinus amplus
  • †Polygnathus
    • †Polygnathus abbessensis
    • †Polygnathus angusticostatus
    • †Polygnathus angustipennatus – or unidentified comparable form
    • †Polygnathus bagialensis
    • †Polygnathus benderi
    • †Polygnathus bultyncki
    • †Polygnathus costatus
    • †Polygnathus damelei – type locality for species
    • †Polygnathus eiflius
    • †Polygnathus gronbergi
    • †Polygnathus holynensis – type locality for species
    • †Polygnathus linguiformis
    • †Polygnathus parawebbi
    • †Polygnathus pseudofoliatus
    • †Polygnathus robertensis – type locality for species
    • †Polygnathus salixensis – type locality for species
    • †Polygnathus serotinus
  • †Polyplucograptus
  • †Polypora
    • †Polypora keyserlingiformis – type locality for species
    • †Polypora remota
    • †Polypora sargaensis
  • †Polyporella
    • †Polyporella helgersonia – type locality for species
  • †Polythalamia – type locality for genus
    • †Polythalamia americana – type locality for species
  • †Pontisia
    • †Pontisia boodi
  • †Porcellia
    • †Porcellia denayi
  • †Poronileus
    • †Poronileus fistulosus
    • †Poronileus vallancei
  • †Porosublastus
    • †Porosublastus inexpectus
  • †Posidonia
    • †Posidonia becheri
  • †Poteriocrinites
    • †Poteriocrinites permicus
  • †Praedaraelites
    • †Praedaraelites loeblichi
  • †Praenatica
  • †Praewaagenoconcha
  • †Prasopora
  • †Prehousia
    • †Prehousia alata
    • †Prehousia impolita
    • †Prehousia indenta
    • †Prehousia prima
    • †Prehousia semicircularis
  • †Presbynileus
    • †Presbynileus ibexensis
  • †Primaspis
  • †Prioniodina – tentative report
  • †Priscella
  • †Proaulopora
  • †Prodentalium
    • †Prodentalium canna
  • †Productella
  • †Proehmaniella
    • †Proehmaniella hebes – tentative report
  • Restoration of the Silurian trilobite Proetus
    †Proetus
  • †Profallotaspis – tentative report
  • †Profusulinella
    • †Profusulinella copiosa
    • †Profusulinella decora
  • †Prolecanites
    • †Prolecanites lyoni
  • †Promytilus
  • †Proplina
    • †Proplina propina – or unidentified comparable form
  • †Protathyris
    • †Protathyris hesperalis
  • †Protocalymene
    • †Protocalymene mcallesteri
  • †Protochonetes
    • †Protochonetes elyensis – type locality for species
  • †Protocortezorthis
    • †Protocortezorthis windmillensis – type locality for species
  • †Protoentactinia
    • †Protoentactinia gracilispinosa – type locality for species
    • †Protoentactinia latospinosa – type locality for species
    • †Protoentactinia minuta – type locality for species
  • †Protopanderodus
    • †Protopanderodus insculptus
  • †Protopharetra
    • †Protopharetra arcybata – type locality for species
    • †Protopharetra junensis
  • †Protopliomerops
  • †Protopresbynileus
    • †Protopresbynileus glaber – or unidentified comparable form
    • †Protopresbynileus wildeni
  • †Protospongia
    • †Protospongia conica
    • †Protospongia spina – type locality for species
  • †Prototreta
  • †Protowentzelella
    • †Protowentzelella cystosa – type locality for species
    • †Protowentzelella kunthi – type locality for species
    • †Protowentzelella variabilis – type locality for species
  • †Protozyga – tentative report
  • †Psalikilus
    • †Psalikilus pikum
  • †Psephosthenaspis
    • †Psephosthenaspis ellipsepyga
    • †Psephosthenaspis glabrior
    • †Psephosthenaspis pseudobathyurus
  • †Pseudagnostus
    • †Pseudagnostus communis
    • †Pseudagnostus contracta – type locality for species
    • †Pseudagnostus josephus
  • †Pseudedriophus
    • †Pseudedriophus guensburgi
  • †Pseudoammodiscus
  • †Pseudoatrypa – tentative report
    • †Pseudoatrypa percrassa
  • †Pseudobatostomella
    • †Pseudobatostomella irregularis – type locality for species
  • †Pseudobelodina
    • †Pseudobelodina inclinata
    • †Pseudobelodina kinki
    • †Pseudobelodina vulgaris
  • †Pseudocybele
    • †Pseudocybele altinasuta
    • †Pseudocybele lemurei
    • †Pseudocybele nasuta
  • †Pseudocystophora
    • †Pseudocystophora complexa
  • †Pseudoendothyra
  • †Pseudofusulinella
    • †Pseudofusulinella dunbari
    • †Pseudofusulinella jeffordsi – type locality for species
    • †Pseudofusulinella pusilla – type locality for species
    • †Pseudofusulinella rotunda
  • †Pseudohystricurus
  • †Pseudokingstonia
    • †Pseudokingstonia exotica
  • †Pseudomera
    • †Pseudomera arachnopyge
    • †Pseudomera barrandei
  • †Pseudomonotis
  • †Pseudoneotodus
    • †Pseudoneotodus beckmanni
    • †Pseudoneotodus mitratus
  • †Pseudoolenoides
    • †Pseudoolenoides acicaudus
    • †Pseudoolenoides dilectus – or unidentified comparable form
  • †Pseudooneotodus
    • †Pseudooneotodus mitratus
  • †Pseudoparazyga
    • †Pseudoparazyga cooperi
  • †Pseudoreichelina
  • †Pseudorthoceras
  • †Pseudosaratogia
    • †Pseudosaratogia abnormis
    • †Pseudosaratogia leptogranulata
  • †Pseudostaffella
    • †Pseudostaffella needhami
  • †Pseudosyrinx
    • †Pseudosyrinx desiderata
  • †Pseudotaxis
  • †Pseudovermiporella
  • †Pseudozaphrentoides
    • †Pseudozaphrentoides hanseni
    • †Pseudozaphrentoides trojana – type locality for species
  • †Pseudozygopleura
  • †Ptarmiganoides
    • †Ptarmiganoides araneicauda – type locality for species
    • †Ptarmiganoides crassaxis
    • †Ptarmiganoides hexacantha
    • †Ptarmiganoides lepida – tentative report
    • †Ptarmiganoides propinqua
  • †Pterinopecten
    • †Pterinopecten spio
  • †Pterocephalia
    • †Pterocephalia concava
    • †Pterocephalia elongata
    • †Pterocephalia punctata
    • †Pterocephalia sanctisabae
  • Fossil of the Cambrian trilobite Ptychagnostus
    †Ptychagnostus
  • †Ptychomphalina
    • †Ptychomphalina type locality for species – informal
  • †Ptychophyllum – tentative report
  • †Ptychopleurella
  • †Ptychopleurites
    • †Ptychopleurites bevifrons – or unidentified comparable form
  • †Ptyocephalus
    • †Ptyocephalus accliva
    • †Ptyocephalus vigilans
  • †Pugilator
    • †Pugilator deckeri
  • †Punctaparchites
  • †Punctospirifer
    • †Punctospirifer gnomus – type locality for species
    • †Punctospirifer kentuckensis
    • †Punctospirifer kentuekyensis
  • †Punka
    • †Punka caecata
  • †Pycnostylus

Q
  • †Quadratia
    • †Quadratia hirsutiformis
  • †Quadratonucula
    • †Quadratonucula stella – type locality for species
  • †Quadricarina
    • †Quadricarina glabrobasis
    • †Quadricarina type locality for species A. – informal
  • †Quadrithyris
    • †Quadrithyris minuens – or unidentified comparable form
    • †Quadrithyris vijaicus – or unidentified comparable form
  • †Quadrochonetes
    • †Quadrochonetes type locality for species A – informal
  • †Quasimodaspis
    • †Quasimodaspis brentsae

R
  • †Radiastraea
    • †Radiastraea arachne
    • †Radiastraea nevadensis
  • †Radiastrea
  • †Radiatrypa
    • †Radiatrypa advena
    • †Radiatrypa klukasi
  • †Rafinesquina
  • †Raphistoma
    • †Raphistoma gubanovi
  • †Raymondaspis
    • †Raymondaspis vespertina
  • †Raymondella
    • †Raymondella nevadensis
  • †Raymondensis – tentative report
  • †Raymondites – tentative report
  • †Rayonnoceras
  • Fossil of the Early Ordovician-Permian benthic alga Receptaculites
    †Receptaculites
  • †Rectifenestella
    • †Rectifenestella cordiretiformis – type locality for species
    • †Rectifenestella tenax
  • †Rectograptus
    • †Rectograptus abbreviatus
  • †Remopleurides
    • †Remopleurides similus – or unidentified comparable form
    • †Remopleurides simulus – or unidentified comparable form
  • †Renalcis
  • †Rensselaeria
  • †Rensselaerina
  • †Rensselandia
    • †Rensselandia cloudi – type locality for species
  • †Repinaella
  • †Resserella
  • †Reteporidra
    • †Reteporidra anaphora
  • †Reticulariina
  • †Reticularina
    • †Reticularina campestris
    • †Reticularina spinosa
  • †Reticulariopsis
  • †Retilamina
    • †Retilamina debrennei
  • †Retispira
    • †Retispira albapinensis
    • †Retispira nolani – type locality for species
  • †Rhabdiferoceras – type locality for genus
    • †Rhabdiferoceras annuliferum – type locality for species
  • †Rhabdocyclus
    • †Rhabdocyclus depressus
  • †Rhabdomeson
  • †Rhipidomella
    • †Rhipidomella carbonaria
    • †Rhipidomella elyensis
    • †Rhipidomella nevadensis
  • †Rhipidothyris
    • †Rhipidothyris circo – type locality for species
  • †Rhizophyllum
    • †Rhizophyllum inornatum
  • †Rhombifera
  • †Rhombopora
    • †Rhombopora cornwallis
  • †Rhombotrypella
    • †Rhombotrypella regularis
    • †Rhombotrypella sunfloweria
  • †Rhynchocamara
    • †Rhynchocamara breviplicata – or unidentified comparable form
    • †Rhynchocamara sublaevis
  • †Rhynchopora
    • †Rhynchopora taylori
  • †Rhynchospirina
  • †Rhynoleichus
    • †Rhynoleichus weeksi
  • †Rhysostrophia
    • †Rhysostrophia nevadensis
    • †Rhysostrophia occidentalis
  • †Rhyssochonetes
    • †Rhyssochonetes solox
  • †Rimmyjimina
  • †Rioceras – tentative report
  • †Robergia
  • †Robergiella
  • †Rossaspis
  • †Rossoceras
  • †Rossodus – tentative report
    • †Rossodus tenuis
  • †Rostranteris
    • †Rostranteris type locality for species A – informal
  • †Rotopericyclus
    • †Rotopericyclus pinyonensis – type locality for species
  • †Roundya
  • †Rousseauspira
    • †Rousseauspira teicherti
  • †Ruedemannoceras
  • †Rugatia
    • †Rugatia occidentalis – or unidentified comparable form
  • †Rugocoelia – type locality for genus
    • †Rugocoelia eganensis – type locality for species
  • †Rugosochonetes

S
  • †Sabellidites
    • †Sabellidites canadiensis
  • †Saffordophyllum
  • †Sagittodontus
    • †Sagittodontus robustus – tentative report
  • †Sallya
  • †Salopina
  • Illustration of fossilized shells of the mysterious Cambrian organism Salterella
    †Salterella
  • †Sandolasma
    • †Sandolasma buttense – type locality for species
    • †Sandolasma elegans
    • †Sandolasma hillae – type locality for species
    • †Sandolasma perplexa – type locality for species
  • †Sanguinolites
    • †Sanguinolites salteri
  • †Sansabella – tentative report
  • †Scabbardella
    • †Scabbardella altipes
  • †Scandodus
    • †Scandodus unicostatus
  • †Scaphorthis
  • †Sceptropora
    • †Sceptropora faculum
  • †Schedexocrinus
  • †Schistometopus
  • †Schizambon
  • †Schizodus
    • †Schizodus curtiformis
    • †Schizodus semistriatus – or unidentified comparable form
  • †Schizophoria
    • †Schizophoria depressa
    • †Schizophoria fascicostella – or unidentified comparable form
    • †Schizophoria mcfarlanei
    • †Schizophoria nevadaensis
    • †Schizophoria parafragilis – type locality for species
    • †Schizophoria simpsoni
    • †Schizophoria texana
  • †Schizoporia
    • †Schizoporia resupinoides
    • †Schizoporia texana
  • †Schmidtella
  • †Schmidtites – tentative report
  • †Schubertella
    • †Schubertella kingi
  • †Schuchertella
  • †Schwagerina
    • †Schwagerina jeffordsi – type locality for species
    • †Schwagerina munda – type locality for species
    • †Schwagerina rotunda
  • †Scinocephalus
    • †Scinocephalus solitecti – or unidentified related form
  • †Sciophyllum
  • †Scolopodus
    • †Scolopodus insculptus
  • †Scotiaecystis – tentative report
  • †Scotoharpes
  • †Secuicollacta
    • †Secuicollacta stelligera – type locality for species
  • †Selenimyalina
  • †Semizona
    • †Semizona glindmeyeri
  • †Septabrunsiina
  • †Septaglomospiranella
  • †Septatrypa
  • †Septimyalina
    • †Septimyalina burmai
  • †Septopora
    • †Septopora alternata
    • †Septopora bilateralis
  • †Serpulospira
    • †Serpulospira annulatus – or unidentified comparable form
    • †Serpulospira swickae
  • †Severella
  • †Shamovella
  • †Shastalasma
    • †Shastalasma woodi – type locality for species
  • †Shoshonorthis
    • †Shoshonorthis swanensis – or unidentified comparable form
  • †Shumardia
    • †Shumardia exopthalmus
  • †Siderocyathus – type locality for genus
    • †Siderocyathus duncanae – type locality for species
  • †Sieberella
    • †Sieberella problematica – or unidentified comparable form
    • †Sieberella pyriforma – type locality for species
  • †Sigmocheilus
    • †Sigmocheilus flabellifer
    • †Sigmocheilus grata
    • †Sigmocheilus notha
    • †Sigmocheilus pogonipensis
  • †Simulolenus
    • †Simulolenus granulatus
    • †Simulolenus quadrisulcatus
  • †Sinotubuites
    • †Sinotubuites cienegensis
  • †Sinuites
  • Fossil of the Carboniferous colonial rugose coral Siphonodendron
    †Siphonodendron
    • †Siphonodendron sinousum – or unidentified comparable form
    • †Siphonodendron sinuosum – or unidentified comparable form
    • †Siphonodendron whitneyi – or unidentified comparable form
  • †Siphonodendrum
    • †Siphonodendrum sinuosum – or unidentified comparable form
  • †Sivorthis
    • †Sivorthis eucharis
    • †Sivorthis occidentalis
  • †Skenidioides
    • †Skenidioides oklahomensis
  • †Skenidium
    • †Skenidium asellatum – or unidentified comparable form
  • †Skippella
  • †Soleniscus
  • †Sowerbyella
    • †Sowerbyella merriami
    • †Sowerbyella perplexa – or unidentified comparable form
  • †Sowerbyites
  • †Spathognathodus
    • †Spathognathodus minutus – or unidentified comparable form
  • †Spencia
    • †Spencia quadrata – type locality for species
  • †Sphaerirhynchia
  • Assemblage of fossils of the Ordovician-Triassic blue-green alga Sphaerocodium
    †Sphaerocodium
  • †Sphaerocoryphe
  • †Sphenosteges
    • †Sphenosteges hispidus
  • †Sphenothallus
  • †Sphenotreta
    • †Sphenotreta sulcata – or unidentified comparable form
  • †Spinatrypa
    • †Spinatrypa aspera – or unidentified comparable form
    • †Spinatrypa soetenica – or unidentified comparable form
  • †Spinatrypina
    • †Spinatrypina angusticostata
    • †Spinatrypina comitata – or unidentified comparable form
    • †Spinatrypina lamellosa
    • †Spinatrypina recula – type locality for species
  • †Spinella
    • †Spinella talenti – type locality for species
  • †Spinoplasia
    • †Spinoplasia roeni – type locality for species
  • †Spinulicosta
    • †Spinulicosta muirwoodi
  • Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
    †Spirifer
    • †Spirifer arkansanus – or unidentified comparable form
    • †Spirifer centronatus
    • †Spirifer haydenianus – or unidentified related form
    • †Spirifer occidus
    • †Spirifer opimus
    • †Spirifer pellaensis – tentative report
    • †Spirifer rockymontanus
  • †Spiriferella
    • †Spiriferella scobina – type locality for species
  • †Spiriferellina
    • †Spiriferellina campestris
    • †Spiriferellina ceres
    • †Spiriferellina lata
  • †Spiriferina
  • †Spirigerina
    • †Spirigerina supramarginalis
  • †Spirinella
    • †Spirinella pauciplicata
  • †Spirocyathella – tentative report
    • †Spirocyathella microporosa – type locality for species
  • †Spirodentalium
    • †Spirodentalium walcotti – type locality for species
  • Modern shells of the polychaete worm Spirorbis
    Spirorbis
  • †Spongophyllum
  • †Spygoria – type locality for genus
    • †Spygoria zappania – type locality for species
  • †Squamaria
  • †Squameofavosites
  • †Stachyodes
  • †Staffella
    • †Staffella expansa
  • †Staufferella
  • †Stauromatidium
  • †Stegnopsis
  • †Stegocoelia
  • †Stelechophyllum – tentative report
  • †Stellahexaformis – type locality for genus
    • †Stellahexaformis gersterensis – type locality for species
  • †Stellarocrinus
    • †Stellarocrinus comptus
    • †Stellarocrinus cuneatus
  • †Stenambon
    • †Stenambon megagranulus
    • †Stenambon paucigranulus
  • †Stenodiscus
    • †Stenodiscus murdockensis – type locality for species
  • †Stenoglaphyrites
    • †Stenoglaphyrites hesperius
    • †Stenoglaphyrites merriami
  • †Stenoloron
    • †Stenoloron minor
  • †Stenopecrinus – tentative report
    • †Stenopecrinus xerophilus
  • †Stenopora
    • †Stenopora parvaexozona – type locality for species
  • †Stenothecoides
  • †Stephenaspis
    • †Stephenaspis avitus – type locality for species
    • †Stephenaspis highlandensis
  • †Stereodictyum
    • †Stereodictyum proteron – type locality for species
  • †Stereolasma
  • †Stereostylus
    • †Stereostylus compressum
  • †Stibaraster
  • †Stictoporella
  • Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system
    †Stigmaria
    • †Stigmaria wedingtonensis
  • †Strachanognathus
    • †Strachanognathus parvus
  • †Straparollus
    • †Straparollus caementarius
    • †Straparollus lonemountainensis
    • †Straparollus spergenensis – or unidentified related form
  • †Streblochondria
  • †Streblopteria
    • †Streblopteria similis
  • †Streblotrypa
    • †Streblotrypa elongata – type locality for species
  • †Streptacis
  • †Streptelasma
    • †Streptelasma prolongatum
  • †Streptognathodus
    • †Streptognathodus unicornis
  • †Streptorhynchus
  • †Streptosolen
    • †Streptosolen mccafferyi – type locality for species
    • †Streptosolen nodosus – type locality for species
    • †Streptosolen occidentalis
  • †Strianematina
  • †Striatifera
  • †Striatopora
  • †Strigambitus
    • †Strigambitus bilobus
    • †Strigambitus transversus
    • †Strigambitus utahensis
  • †Strigigenalis
  • †Stringocephalus
    • †Stringocephalus nevadensis – type locality for species
  • †Strobeus
  • †Stromatopora
  • †Strombodes
  • †Stropheodonta
    • †Stropheodonta filicosta
    • †Stropheodonta magnacosta – type locality for species
  • †Stropheodontida
  • †Strophochonetes
  • Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
    †Strophomena
  • †Strophonella
    • †Strophonella bohemica – or unidentified comparable form
    • †Strophonella punctulifera – or unidentified comparable form
  • †Strophostylus
    • †Strophostylus nevadensis – type locality for species
    • †Strophostylus tantillus – type locality for species
  • †Stuartwellercrinus
    • †Stuartwellercrinus corbatoi
  • †Stummelasma
    • †Stummelasma antelopense
    • †Stummelasma lonense
    • †Stummelasma sulfurense – type locality for species
  • †Stygina – tentative report
  • †Styliolina
  • †Stylonema – tentative report
  • †Stylopleura
    • †Stylopleura berthiaumi
    • †Stylopleura nevadensis
  • †Styracograptus
    • †Styracograptus mississippiensis
    • †Styracograptus tatianae
  • †Subrensselandia
    • †Subrensselandia nolani
  • †Subrensselendia
  • †Subretepora
  • †Subulites
  • †Sulcoretepora
    • †Sulcoretepora corticata
    • †Sulcoretepora irregularis
  • †Sychnoelasma
    • †Sychnoelasma alrichanum – or unidentified comparable form
    • †Sychnoelasma ulrichanum – or unidentified comparable form
  • †Symphysurina
    • †Symphysurina walcotti
  • †Synarmocrinus
    • †Synarmocrinus brachiatus – type locality for species
  • †Syndielasma
    • †Syndielasma biseptatum
  • †Syngastrioceras
  • †Synprioniodina – tentative report
  • †Syntrophina – tentative report
  • †Syntrophopsis
    • †Syntrophopsis polita
  • †Synyphocrinus
    • †Synyphocrinus permicus
  • †Syringaxon
  • Fossil of the Devonian tabulate coral Syringopora
    †Syringopora
    • †Syringopora surcularia
  • †Syringostroma
  • †Syspacephalus
    • †Syspacephalus crassus
    • †Syspacephalus laticeps – or unidentified comparable form
    • †Syspacephalus longus
    • †Syspacephalus uncus – tentative report
    • †Syspacephalus variosus – type locality for species

T
  • †Tabulipora
    • †Tabulipora carbonaria – type locality for species
    • †Tabulipora hispida
  • †Tabulophyllum
  • †Taenora
    • †Taenora expansa
  • †Tancrediopsis
    • †Tancrediopsis cuneata – or unidentified related form
  • †Taphrodonta
    • †Taphrodonta parallela
  • †Tapinotomaria
  • †Tecnocyrtina
    • †Tecnocyrtina fissiplicata
    • †Tecnocyrtina missouriensis
  • †Tegerocyathus
    • †Tegerocyathus edelsteini
  • †Teichertina
    • †Teichertina americana – type locality for species
    • †Teichertina fitzroyensis
  • †Teiichispira
    • †Teiichispira auricula – type locality for species
  • †Telephina
  • †Temnocheilus
  • †Temnophyllum
    • †Temnophyllum waltheri – type locality for species
  • †Tentaculites
  • Fossils of the Early-Late Ordovician graptolite Tetragraptus
    †Tetragraptus
    • †Tetragraptus bigsbyi
  • †Tetraprioniodus – tentative report
    • †Tetraprioniodus costatus
  • †Tetrataxis
    • †Tetrataxis angusta
  • †Texacrinus
    • †Texacrinus distortus
  • †Thamniscus
    • †Thamniscus erraticus – type locality for species
  • †Thamnopora
    • †Thamnopora limitaris
  • †Thamnosia
    • †Thamnosia depressa
  • Fossil of the Cambrian trilobite Thoracocare
    †Thoracocare
    • †Thoracocare idahoensis
  • †Tikhinella
  • †Timaniella
    • †Timaniella pseudocamerata – or unidentified comparable form
  • †Timanodictya
    • †Timanodictya dichotoma – or unidentified comparable form
  • †Toernquistia – tentative report
  • †Tonkinaria
    • †Tonkinaria simpsoni
  • †Tonkinella
    • †Tonkinella breviceps
    • †Tonkinella valida
  • †Tonopahella – type locality for genus
    • †Tonopahella goldfieldensis – type locality for species
  • †Toquimaella
    • †Toquimaella kayi – type locality for species
  • †Toquimaphyllum
    • †Toquimaphyllum johnsoni
    • †Toquimaphyllum sentum – type locality for species
    • †Toquimaphyllum vulgare – type locality for species
  • †Toquimia
    • †Toquimia kirki
  • †Tortodus
    • †Tortodus australis
    • †Tortodus kockelianus
  • †Torynifer
    • †Torynifer internascens – or unidentified comparable form
  • †Totiglobus – type locality for genus
    • †Totiglobus nimius – type locality for species
  • †Trachycheilus
    • †Trachycheilus whirlwindensis
  • †Trachydomia
  • †Trachyspira
  • †Trampidocrinus
    • †Trampidocrinus bellicus
    • †Trampidocrinus phiola
  • †Trematopora
  • †Trematorthis
    • †Trematorthis tenuis
  • †Trematospira
    • †Trematospira perforata
  • †Trepospira
  • Restoration showing the top (left) and underside of the Late Ordovician trilobite Triarthrus
    †Triarthrus
  • †Trichonodella
    • †Trichonodella barbara – or unidentified comparable form
  • †Trigonirhynchia
    • †Trigonirhynchia occidens
  • †Trigonocerca
    • †Trigonocerca typica
  • †Trigrammaria
  • †Trinodus
  • †Tritoechia
    • †Tritoechia sinuata
  • †Trocholites
  • †Trochonema – tentative report
  • †Tropidodiscus
  • †Trupetostroma
  • †Tryplasma
    • †Tryplasma duncanae
    • †Tryplasma radicula
  • †Tschussovskenia
    • †Tschussovskenia connorsensis – type locality for species
    • †Tschussovskenia dilata
  • †Tuberitina
  • †Tumicephalus
    • †Tumicephalus depressus
  • †Turbonitella
    • †Turbonitella biserialis – or unidentified related form
  • Fossilized shell of the Cambrian arthropod Tuzoia
    †Tuzoia
  • †Tyersella
  • †Tylonautilus
  • †Tylothyris
  • †Tympanuella
    • †Tympanuella transversa

U
  • †Ufimia
  • †Undispirifer
  • †Uraloceras
    • †Uraloceras burtiense
    • †Uraloceras involutum
    • †Uraloceras nevadense – type locality for species
  • †Uromystrum
    • †Uromystrum validum – or unidentified comparable form
  • †Ursinella – type locality for genus
    • †Ursinella major – type locality for species
  • †Utharocrinus

V
  • †Vagrania
    • †Vagrania gronbergi
  • †Valcourea
    • †Valcourea intracarinata
    • †Valcourea plana
    • †Valcourea transversa
  • †Vallomyonia
    • †Vallomyonia claudiae
    • †Vallomyonia devonica
  • †Varatrypa
  • †Vargania
    • †Vargania gronbergi
  • †Variatrypa
    • †Variatrypa exoleta
    • †Variatrypa licta – type locality for species
  • †Varvia – tentative report
  • †Verpaspongia – type locality for genus
    • †Verpaspongia nodosa – type locality for species
  • †Verticillopora
  • †Vesiculophyllum
  • †Vesperispira – type locality for genus
    • †Vesperispira humboldtiana – type locality for species
  • †Vidronovella
    • †Vidronovella fastigiata
  • †Virgiana
    • †Virgiana utahensis – type locality for species
  • †Volocephalina
    • †Volocephalina connexa
    • †Volocephalina variosa – type locality for species
  • †Volocphalina
    • †Volocphalina variosa – type locality for species

W
  • †Waagenella
    • †Waagenella vespertinus – type locality for species
  • †Waagenites
    • †Waagenites type locality for species A – informal
    • †Waagenites type locality for species B – informal
  • †Waagenoconcha – tentative report
  • †Walliserodus
    • †Walliserodus amplissimus
    • †Walliserodus curvatus
  • Fossil of the Cambrian trilobite Wanneria
    †Wanneria
    • †Wanneria walcottana – or unidentified comparable form
  • †Warburgella
    • †Warburgella rugulosa
  • †Warrenella
    • †Warrenella franklinii
    • †Warrenella kirki
    • †Warrenella nevadensis
    • †Warrenella occidentalis
    • †Warrenella plicata
    • †Warrenella praekirki
  • †Watsonella
  • †Weirchellatia
  • †Wellerella
    • †Wellerella delicatula – or unidentified comparable form
    • †Wellerella osagensis
    • †Wellerella truncata
  • †Wendoverella – type locality for genus
    • †Wendoverella arca – type locality for species
  • †Wenkchemnia
    • †Wenkchemnia sulcata
    • †Wenkchemnia walcotti
  • †Westergaardites
  • †Westmontia
    • †Westmontia devilensis
  • †Weyerides – tentative report
  • †Whittingtonia – tentative report
  • †Wilberrya
    • †Wilberrya fragilis
  • †Williamicyathus
  • †Wilsonastraea
    • †Wilsonastraea fraseri – type locality for species
    • †Wilsonastraea parva – type locality for species
    • †Wilsonastraea smithi
  • †Wimanella – tentative report
  • †Winchellatia
  • †Wjatkella
    • †Wjatkella hemiseptifera – type locality for species
    • †Wjatkella permiana
  • †Worthenia
    • †Worthenia corrugata
  • †Wujiajiania
    • †Wujiajiania sutherlandi
  • †Wutinoceras
    • †Wutinoceras huygenae – or unidentified comparable form

X
  • †Xenelasma – tentative report
  • †Xenocheilos
    • †Xenocheilos granulosus
  • †Xenostegium
    • †Xenostegium franklinense – or unidentified comparable form
  • †Xestotrema
    • †Xestotrema pulchrum – type locality for species
  • †Xystocrania
    • †Xystocrania perforator
    • †Xystocrania pyriformis – type locality for species

Y
  • †Yakovlevia
    • †Yakovlevia multistriata – type locality for species
  • †Yinograptus
    • †Yinograptus disjunctus
  • †Yochelsonospira
    • †Yochelsonospira tenuilineata
  • Yoldia
  • †Youngia – tentative report
  • †Yuknessaspis
    • †Yuknessaspis benningtonis
  • †Yunnania

Z
  • †Zacanthoides
    • †Zacanthoides alatus – or unidentified comparable form
    • †Zacanthoides demissus
    • †Zacanthoides divergensis
    • †Zacanthoides variacantha
    • †Zacanthoides walapai
  • †Zacanthopsina – type locality for genus
    • †Zacanthopsina eperephes – type locality for species
  • †Zacanthopsis
    • †Zacanthopsis contractus – type locality for species
    • †Zacanthopsis levis
  • †Zelophyllum – tentative report
  • †Zonophyllum
    • †Zonophyllum lonense
    • †Zonophyllum robertsense
  • †Zygognathus
  • †Zygospira
gollark: You should write more tests.
gollark: ***dun dun dun***
gollark: Sounds hard. I just want a useless fun thing. Is there a library for it?
gollark: You can never have enough combinatory things! How does the working-backwards-from-type thing work, anyway?
gollark: ```haskellq :: ((a0 b0 c0 -> m0 c1) -> (a0 b0 c0 -> (a0 b'0 c'0 -> a0 (b0, b'0) (c0, c'0)) -> m0 c1) -> m0 c1) -> (a0 b0 c0 -> m0 (a0 b0 c0 -> (a0 b'0 c'0 -> a0 (b0, b'0) (c0, c'0)) -> m0 c1)) -> (a0 b0 c0 -> (a0 b'0 c'0 -> a0 (b0, b'0) (c0, c'0)) -> m0 c1) -> m0 c1)q = (>>=) (<*> (***)) >>= (>>>) <$> (($) . (<=<))```

References
    • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 7 August 2017.
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